René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"add_comment_to_pending_review runs the GraphQL query on a missing required argument instead of validating it","articleBody":"### Describe the bug\n\n`add_comment_to_pending_review` decodes its arguments with `mapstructure.WeakDecode` and never checks the required ones. An omitted required argument (e.g. `owner`) is left as the zero value and sent to the GraphQL API, which then fails downstream with a confusing message instead of a clear \"this argument is required\". The other pull request tools (`pull_request_read`, etc.) validate with `RequiredParam`/`RequiredInt`.\n\n### Affected version\n\n```\nVersion: v1.3.0\nCommit: 34227037fc48771baea9af7163e28cb6556ef287\nBuild Date: 2026-06-11T14:16:55Z\n```\n\n### Steps to reproduce the behavior\n\n1. Call `add_comment_to_pending_review` with `owner` omitted, e.g. `{ \"repo\": \"gated-probe\", \"pullNumber\": 1, \"path\": \"f.go\", \"body\": \"x\", \"subjectType\": \"LINE\" }`.\n2. View the output.\n3. The server runs the query with an empty owner and returns:\n   ```\n   failed to get latest review for current user: Could not resolve to a Repository with the name '/gated-probe'.\n   ```\n   Nothing indicates that `owner` was the missing required argument.\n\n### Expected vs actual behavior\n\n**Expected:** `missing required parameter: owner` (consistent with the other PR tools), before any API call.\n\n**Actual:** the handler runs on the incomplete input and returns an unrelated downstream repository-resolution error.\n\n### Logs\n\n```\nfailed to get latest review for current user: Could not resolve to a Repository with the name '/gated-probe'.\n```\n\n\u003e Note: the same `WeakDecode`-without-validation pattern also exists in `copilot.go` and `discussions.go` — happy to follow up separately.","author":{"url":"https://github.com/gustavo-sec","@type":"Person","name":"gustavo-sec"},"datePublished":"2026-06-17T13:35:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/2718/github-mcp-server/issues/2718"}