René's URL Explorer Experiment


Title: Clarify tool validation error messages by tzolov · Pull Request #1023 · modelcontextprotocol/java-sdk · GitHub

Open Graph Title: Clarify tool validation error messages by tzolov · Pull Request #1023 · modelcontextprotocol/java-sdk

X Title: Clarify tool validation error messages by tzolov · Pull Request #1023 · modelcontextprotocol/java-sdk

Description: DefaultJsonSchemaValidator now emits a neutralmessage; Call sites in ToolInputValidator and the server output handlers prepend their own context prefix, Integration test assertions strengthened accordingly. Closes #986

Open Graph Description: DefaultJsonSchemaValidator now emits a neutralmessage; Call sites in ToolInputValidator and the server output handlers prepend their own context prefix, Integration test assertions strengthened acc...

X Description: DefaultJsonSchemaValidator now emits a neutralmessage; Call sites in ToolInputValidator and the server output handlers prepend their own context prefix, Integration test assertions strengthened acc...

Opengraph URL: https://github.com/modelcontextprotocol/java-sdk/pull/1023

X: @github

direct link

Domain: github.com

route-pattern/:user_id/:repository/pull/:id/files(.:format)
route-controllerpull_requests
route-actionfiles
fetch-noncev2:9411e3f7-a659-71c4-3700-64a644d19baa
current-catalog-service-hashae870bc5e265a340912cde392f23dad3671a0a881730ffdadd82f2f57d81641b
request-id8234:12D7DC:5C4B0C4:793662E:6A5DB9B3
html-safe-nonce2256324c2f4a43ad7b892128abff43d6c39fc504194e4e6bea648690f115a0e7
visitor-payloadeyJyZWZlcnJlciI6IiIsInJlcXVlc3RfaWQiOiI4MjM0OjEyRDdEQzo1QzRCMEM0Ojc5MzY2MkU6NkE1REI5QjMiLCJ2aXNpdG9yX2lkIjoiMTU3NTQwNDUxMTQ0NzMzMzI5OSIsInJlZ2lvbl9lZGdlIjoiaWFkIiwicmVnaW9uX3JlbmRlciI6ImlhZCJ9
visitor-hmac81c4162f9fd815554803ee2f26e93fa0f33f1523fad7743301619bfaa8a51133
hovercard-subject-tagpull_request:3845257410
github-keyboard-shortcutsrepository,pull-request-list,pull-request-conversation,pull-request-files-changed,copilot
google-site-verificationApib7-x98H0j5cPqHWwSMm6dNU4GmODRoqxLiDzdx9I
octolytics-urlhttps://collector.github.com/github/collect
analytics-location///pull_requests/show/files
fb:app_id1401488693436528
apple-itunes-appapp-id=1477376905, app-argument=https://github.com/modelcontextprotocol/java-sdk/pull/1023/files
twitter:imagehttps://avatars.githubusercontent.com/u/1351573?s=400&v=4
twitter:cardsummary_large_image
og:imagehttps://avatars.githubusercontent.com/u/1351573?s=400&v=4
og:image:altDefaultJsonSchemaValidator now emits a neutralmessage; Call sites in ToolInputValidator and the server output handlers prepend their own context prefix, Integration test assertions strengthened acc...
og:site_nameGitHub
og:typeobject
hostnamegithub.com
expected-hostnamegithub.com
None5290d7e14309ad1e76106a9c4237bd1041517e83ea182c8ab756752cb0c6940b
turbo-cache-controlno-preview
diff-viewunified
go-importgithub.com/modelcontextprotocol/java-sdk git https://github.com/modelcontextprotocol/java-sdk.git
octolytics-dimension-user_id182288589
octolytics-dimension-user_loginmodelcontextprotocol
octolytics-dimension-repository_id919609219
octolytics-dimension-repository_nwomodelcontextprotocol/java-sdk
octolytics-dimension-repository_publictrue
octolytics-dimension-repository_is_forkfalse
octolytics-dimension-repository_network_root_id919609219
octolytics-dimension-repository_network_root_nwomodelcontextprotocol/java-sdk
turbo-body-classeslogged-out env-production page-responsive full-width
disable-turbotrue
browser-stats-urlhttps://api.github.com/_private/browser/stats
browser-errors-urlhttps://api.github.com/_private/browser/errors
release9c975978430e9ad293956f2bbdaf153b1bd84a99
ui-targetfull
theme-color#1e2327
color-schemelight dark

Links:

Skip to contenthttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#start-of-content
https://github.com/
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fmodelcontextprotocol%2Fjava-sdk%2Fpull%2F1023%2Ffiles
GitHub CopilotWrite better code with AIhttps://github.com/features/copilot
GitHub Copilot appDirect agents from issue to mergehttps://github.com/features/ai/github-app
MCP RegistryNewIntegrate external toolshttps://github.com/mcp
ActionsAutomate any workflowhttps://github.com/features/actions
CodespacesInstant dev environmentshttps://github.com/features/codespaces
IssuesPlan and track workhttps://github.com/features/issues
Code ReviewManage code changeshttps://github.com/features/code-review
GitHub Advanced SecurityFind and fix vulnerabilitieshttps://github.com/security/advanced-security
Code securitySecure your code as you buildhttps://github.com/security/advanced-security/code-security
Secret protectionStop leaks before they starthttps://github.com/security/advanced-security/secret-protection
Why GitHubhttps://github.com/why-github
Documentationhttps://docs.github.com
Bloghttps://github.blog
Changeloghttps://github.blog/changelog
Marketplacehttps://github.com/marketplace
View all featureshttps://github.com/features
Enterpriseshttps://github.com/enterprise
Small and medium teamshttps://github.com/team
Startupshttps://github.com/enterprise/startups
Nonprofitshttps://github.com/solutions/industry/nonprofits
App Modernizationhttps://github.com/solutions/use-case/app-modernization
DevSecOpshttps://github.com/solutions/use-case/devsecops
DevOpshttps://github.com/solutions/use-case/devops
CI/CDhttps://github.com/solutions/use-case/ci-cd
View all use caseshttps://github.com/solutions/use-case
Healthcarehttps://github.com/solutions/industry/healthcare
Financial serviceshttps://github.com/solutions/industry/financial-services
Manufacturinghttps://github.com/solutions/industry/manufacturing
Governmenthttps://github.com/solutions/industry/government
View all industrieshttps://github.com/solutions/industry
View all solutionshttps://github.com/solutions
AIhttps://github.com/resources/articles?topic=ai
Software Developmenthttps://github.com/resources/articles?topic=software-development
DevOpshttps://github.com/resources/articles?topic=devops
Securityhttps://github.com/resources/articles?topic=security
View all topicshttps://github.com/resources/articles
Customer storieshttps://github.com/customer-stories
Events & webinarshttps://github.com/resources/events
Ebooks & reportshttps://github.com/resources/whitepapers
Business insightshttps://github.com/solutions/executive-insights
GitHub Skillshttps://skills.github.com
Documentationhttps://docs.github.com
Customer supporthttps://support.github.com
Community forumhttps://github.com/orgs/community/discussions
Trust centerhttps://github.com/trust-center
Partnershttps://github.com/partners
View all resourceshttps://github.com/resources
GitHub SponsorsFund open source developershttps://github.com/open-source/sponsors
Security Labhttps://securitylab.github.com
Maintainer Communityhttps://maintainers.github.com
Acceleratorhttps://github.com/open-source/accelerator
GitHub Starshttps://stars.github.com
Archive Programhttps://archiveprogram.github.com
Topicshttps://github.com/topics
Trendinghttps://github.com/trending
Collectionshttps://github.com/collections
Enterprise platformAI-powered developer platformhttps://github.com/enterprise
GitHub Advanced SecurityEnterprise-grade security featureshttps://github.com/security/advanced-security
Copilot for BusinessEnterprise-grade AI featureshttps://github.com/features/copilot/copilot-business
Premium SupportEnterprise-grade 24/7 supporthttps://github.com/enterprise/premium-support
Pricinghttps://github.com/pricing
Search syntax tipshttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
documentationhttps://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax
Sign in https://github.com/login?return_to=https%3A%2F%2Fgithub.com%2Fmodelcontextprotocol%2Fjava-sdk%2Fpull%2F1023%2Ffiles
Sign up https://github.com/signup?ref_cta=Sign+up&ref_loc=header+logged+out&ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E%2Fpull_requests%2Fshow%2Ffiles&source=header-repo&source_repo=modelcontextprotocol%2Fjava-sdk
Reloadhttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
Reloadhttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
Reloadhttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
Please reload this pagehttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
modelcontextprotocol https://github.com/modelcontextprotocol
java-sdkhttps://github.com/modelcontextprotocol/java-sdk
Notifications https://github.com/login?return_to=%2Fmodelcontextprotocol%2Fjava-sdk
Fork 978 https://github.com/login?return_to=%2Fmodelcontextprotocol%2Fjava-sdk
Star 3.6k https://github.com/login?return_to=%2Fmodelcontextprotocol%2Fjava-sdk
Code https://github.com/modelcontextprotocol/java-sdk
Issues 135 https://github.com/modelcontextprotocol/java-sdk/issues
Pull requests 147 https://github.com/modelcontextprotocol/java-sdk/pulls
Discussions https://github.com/modelcontextprotocol/java-sdk/discussions
Actions https://github.com/modelcontextprotocol/java-sdk/actions
Projects https://github.com/modelcontextprotocol/java-sdk/projects
Models https://github.com/modelcontextprotocol/java-sdk/models
Security and quality 2 https://github.com/modelcontextprotocol/java-sdk/security
Insights https://github.com/modelcontextprotocol/java-sdk/pulse
Code https://github.com/modelcontextprotocol/java-sdk
Issues https://github.com/modelcontextprotocol/java-sdk/issues
Pull requests https://github.com/modelcontextprotocol/java-sdk/pulls
Discussions https://github.com/modelcontextprotocol/java-sdk/discussions
Actions https://github.com/modelcontextprotocol/java-sdk/actions
Projects https://github.com/modelcontextprotocol/java-sdk/projects
Models https://github.com/modelcontextprotocol/java-sdk/models
Security and quality https://github.com/modelcontextprotocol/java-sdk/security
Insights https://github.com/modelcontextprotocol/java-sdk/pulse
Sign up for GitHub https://github.com/signup?return_to=%2Fmodelcontextprotocol%2Fjava-sdk%2Fissues%2Fnew%2Fchoose
terms of servicehttps://docs.github.com/terms
privacy statementhttps://docs.github.com/privacy
Sign inhttps://github.com/login?return_to=%2Fmodelcontextprotocol%2Fjava-sdk%2Fissues%2Fnew%2Fchoose
tzolovhttps://github.com/tzolov
mainhttps://github.com/modelcontextprotocol/java-sdk/tree/main
fix-tool-validation-misleading-error-messages-2https://github.com/modelcontextprotocol/java-sdk/tree/fix-tool-validation-misleading-error-messages-2
Conversation 2 https://github.com/modelcontextprotocol/java-sdk/pull/1023
Commits 3 https://github.com/modelcontextprotocol/java-sdk/pull/1023/commits
Checks 24 https://github.com/modelcontextprotocol/java-sdk/pull/1023/checks
Files changed https://github.com/modelcontextprotocol/java-sdk/pull/1023/files
Please reload this pagehttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
Clarify tool validation error messages https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#top
Show all changes 3 commits https://github.com/modelcontextprotocol/java-sdk/pull/1023/files
d1f62a5 Clarify tool validation error messages tzolov Jun 11, 2026 https://github.com/modelcontextprotocol/java-sdk/pull/1023/commits/d1f62a508e149fe92427288102c58ad933e9fd1f
f89bb99 address review comments tzolov Jun 11, 2026 https://github.com/modelcontextprotocol/java-sdk/pull/1023/commits/f89bb9927480ebdd4e289c6bada2f2a8dc2bc484
2291c7b address review comments tzolov Jun 11, 2026 https://github.com/modelcontextprotocol/java-sdk/pull/1023/commits/2291c7bd6580b71c3e34d8ee22082f123b0b9191
Clear filters https://github.com/modelcontextprotocol/java-sdk/pull/1023/files
Please reload this pagehttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
Please reload this pagehttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
McpAsyncServer.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-43308c9508778eb339f4e3310a6d5ea62b6865e878b60367a810437623efc08f
McpStatelessAsyncServer.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-619ec8d6e2ba9cdf32ae43946adc3c6cee9209a4742afb8308ed3f8579d28689
ToolInputValidator.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-5782d3b4c13a65d788f118fed495eef243c60747d9930ee82701af788d61fc7a
DefaultJsonSchemaValidator.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-cfa91bc4f02799e31f38ffd407c9917ef1dcd74b35c169fdf38520acea496ae5
DefaultJsonSchemaValidatorTests.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-73f9f3008c00f8b50b8b40fe6526d870339b5c1eeea161a61a02cbce0e2aa896
DefaultJsonSchemaValidator.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-88b7b808add8323ce8f08b382887f8e603702e5a8577d9dc8beaeea57828a874
DefaultJsonSchemaValidatorTests.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d857f7f8b3101d0e49f5fa54a01886e3f4167882a6caa6b19fd13c0ced2a6ca0
ToolInputValidationIntegrationTests.java https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d69eb0abc312f21dcf85090d7486be0d1c8f9b47ca9e2f3229e5e6c7b7efe364
mcp-core/src/main/java/io/modelcontextprotocol/server/McpAsyncServer.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-43308c9508778eb339f4e3310a6d5ea62b6865e878b60367a810437623efc08f
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-core/src/main/java/io/modelcontextprotocol/server/McpAsyncServer.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-43308c9508778eb339f4e3310a6d5ea62b6865e878b60367a810437623efc08f
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-43308c9508778eb339f4e3310a6d5ea62b6865e878b60367a810437623efc08f
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-43308c9508778eb339f4e3310a6d5ea62b6865e878b60367a810437623efc08f
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-43308c9508778eb339f4e3310a6d5ea62b6865e878b60367a810437623efc08f
mcp-core/src/main/java/io/modelcontextprotocol/server/McpStatelessAsyncServer.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-619ec8d6e2ba9cdf32ae43946adc3c6cee9209a4742afb8308ed3f8579d28689
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-core/src/main/java/io/modelcontextprotocol/server/McpStatelessAsyncServer.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-619ec8d6e2ba9cdf32ae43946adc3c6cee9209a4742afb8308ed3f8579d28689
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-619ec8d6e2ba9cdf32ae43946adc3c6cee9209a4742afb8308ed3f8579d28689
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-619ec8d6e2ba9cdf32ae43946adc3c6cee9209a4742afb8308ed3f8579d28689
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-619ec8d6e2ba9cdf32ae43946adc3c6cee9209a4742afb8308ed3f8579d28689
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-619ec8d6e2ba9cdf32ae43946adc3c6cee9209a4742afb8308ed3f8579d28689
mcp-core/src/main/java/io/modelcontextprotocol/util/ToolInputValidator.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-5782d3b4c13a65d788f118fed495eef243c60747d9930ee82701af788d61fc7a
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-core/src/main/java/io/modelcontextprotocol/util/ToolInputValidator.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-5782d3b4c13a65d788f118fed495eef243c60747d9930ee82701af788d61fc7a
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-5782d3b4c13a65d788f118fed495eef243c60747d9930ee82701af788d61fc7a
...rc/main/java/io/modelcontextprotocol/json/schema/jackson2/DefaultJsonSchemaValidator.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-cfa91bc4f02799e31f38ffd407c9917ef1dcd74b35c169fdf38520acea496ae5
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-json-jackson2/src/main/java/io/modelcontextprotocol/json/schema/jackson2/DefaultJsonSchemaValidator.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-cfa91bc4f02799e31f38ffd407c9917ef1dcd74b35c169fdf38520acea496ae5
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-cfa91bc4f02799e31f38ffd407c9917ef1dcd74b35c169fdf38520acea496ae5
.../src/test/java/io/modelcontextprotocol/json/jackson2/DefaultJsonSchemaValidatorTests.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-73f9f3008c00f8b50b8b40fe6526d870339b5c1eeea161a61a02cbce0e2aa896
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-json-jackson2/src/test/java/io/modelcontextprotocol/json/jackson2/DefaultJsonSchemaValidatorTests.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-73f9f3008c00f8b50b8b40fe6526d870339b5c1eeea161a61a02cbce0e2aa896
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-73f9f3008c00f8b50b8b40fe6526d870339b5c1eeea161a61a02cbce0e2aa896
...rc/main/java/io/modelcontextprotocol/json/schema/jackson3/DefaultJsonSchemaValidator.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-88b7b808add8323ce8f08b382887f8e603702e5a8577d9dc8beaeea57828a874
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-json-jackson3/src/main/java/io/modelcontextprotocol/json/schema/jackson3/DefaultJsonSchemaValidator.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-88b7b808add8323ce8f08b382887f8e603702e5a8577d9dc8beaeea57828a874
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-88b7b808add8323ce8f08b382887f8e603702e5a8577d9dc8beaeea57828a874
...-jackson3/src/test/java/io/modelcontextprotocol/json/DefaultJsonSchemaValidatorTests.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d857f7f8b3101d0e49f5fa54a01886e3f4167882a6caa6b19fd13c0ced2a6ca0
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-json-jackson3/src/test/java/io/modelcontextprotocol/json/DefaultJsonSchemaValidatorTests.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d857f7f8b3101d0e49f5fa54a01886e3f4167882a6caa6b19fd13c0ced2a6ca0
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d857f7f8b3101d0e49f5fa54a01886e3f4167882a6caa6b19fd13c0ced2a6ca0
...est/src/test/java/io/modelcontextprotocol/server/ToolInputValidationIntegrationTests.javahttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d69eb0abc312f21dcf85090d7486be0d1c8f9b47ca9e2f3229e5e6c7b7efe364
View file https://github.com/modelcontextprotocol/java-sdk/blob/2291c7bd6580b71c3e34d8ee22082f123b0b9191/mcp-test/src/test/java/io/modelcontextprotocol/server/ToolInputValidationIntegrationTests.java
Open in desktop https://desktop.github.com
https://github.co/hiddenchars
https://github.com/modelcontextprotocol/java-sdk/pull/1023/{{ revealButtonHref }}
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d69eb0abc312f21dcf85090d7486be0d1c8f9b47ca9e2f3229e5e6c7b7efe364
https://github.com/modelcontextprotocol/java-sdk/pull/1023/files#diff-d69eb0abc312f21dcf85090d7486be0d1c8f9b47ca9e2f3229e5e6c7b7efe364
Please reload this pagehttps://github.com/modelcontextprotocol/java-sdk/pull/1023/files
https://github.com
Termshttps://docs.github.com/site-policy/github-terms/github-terms-of-service
Privacyhttps://docs.github.com/site-policy/privacy-policies/github-privacy-statement
Securityhttps://github.com/security
Statushttps://www.githubstatus.com/
Communityhttps://github.community/
Docshttps://docs.github.com/
Contacthttps://support.github.com?tags=dotcom-footer

Viewport: width=device-width


URLs of crawlers that visited me.