ac.tandem/docs-mcp

http:https://tandem.ac/mcp

scanned 2026-08-28T07:50:50.509Z rulepack rulepack-2026.08.1 transport http tools 13

crit 1 high 0 med 2 low 0 info 0

critical remote-no-auth LLM08 deterministic

Remote server returns mutating tools without authentication

We enumerated 2 state-changing tool(s) over an unauthenticated connection. Anyone who can reach the endpoint can drive them.

at tool answer_how_to · field endpoint

2 mutating tools, no auth header

reproduce: mcpaudit-scan --http https://tandem.ac/mcp --check remote-no-auth

medium schema-freeform-sink LLM05 deterministic

Unvalidated free-form input on a sink-like parameter

Parameter "path" of tool "get_doc" accepts a free-form string with no enum/pattern/format. If it reaches a shell, filesystem, or outbound request, it is an injection/SSRF surface.

at tool get_doc · field inputSchema.properties.path

{"type":"string","description":"Docs path like /sdk/python/ or a full Tandem doc

reproduce: mcpaudit-scan --http https://tandem.ac/mcp --check schema-freeform-sink

medium schema-freeform-sink LLM05 deterministic

Unvalidated free-form input on a sink-like parameter

Parameter "path" of tool "invalidate_docs_cache" accepts a free-form string with no enum/pattern/format. If it reaches a shell, filesystem, or outbound request, it is an injection/SSRF surface.

at tool invalidate_docs_cache · field inputSchema.properties.path

{"type":"string","description":"Required when target is page; identifies the spe

reproduce: mcpaudit-scan --http https://tandem.ac/mcp --check schema-freeform-sink

This is an automated, point-in-time report from passive metadata analysis (the server's own initialize and tools/list advertisement). No tools were invoked. The grade reflects deterministic checks only; findings marked "llm" are triage signals for human review and do not affect the grade. Verify any finding with its reproduce command. Rulepack rulepack-2026.08.1.