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Limit Docs MCP request bodies and tool input elements

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难度
4/5
预计耗时
1-2 天
新手友好度
55/100
Issue 类型
缺陷
描述清晰度
描述清楚
活跃度
活跃
技术栈
typescript
领域
security

调研方向

Read apps/docs-mcp/src/mcp.ts and apps/docs-mcp/src/index.ts, starting with the server factory and the /mcp and /internal/docs request handlers. Check how @hono/mcp parses request bodies and how the existing tests exercise these routes. Done means documented tool-element and body-size limits are enforced, oversized inputs return deterministic errors, supported requests keep their response contracts, and the specified cases are tested without model calls.

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描述

enhancement MCP

Docs MCP inherits missing resource limits from its source repository. Toolkit already resolves @modelcontextprotocol/sdk to 1.32.0; the official advisory additionally requires explicitly configuring limits. Upgrading @modelcontextprotocol/server to 2.3.0 would target a different SDK package.

The server factory omits maxToolInputElements, and the libs/features arrays have no maximum. The HTTP boundary uses @hono/mcp, which parses JSON itself; configuring the SDK's standard transport would not limit this route.

Access is restricted to service-bound/local requests. No denial of service has been reproduced in Workers.

Acceptance criteria:

  • Configure a documented MCP tool-element budget sized for supported inputs.
  • Enforce a body-size budget before JSON parsing on /mcp and /internal/docs, including bodies without Content-Length.
  • Preserve supported requests and existing response contracts; reject oversized input with deterministic errors.
  • Test valid requests, oversized bodies, and excess tool elements without model calls.

Separate follow-up to the Docs MCP port (#1597). Keep this hardening outside the migration PR.

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TypeScript
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