foundry-mcp

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

92/92 tools missing one or more hints — anvil_start (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); anvil_stop (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); anvil_status (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +89 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

Descriptions match behaviour

31 tools describe read intent but their handlers mutate — cast_block (line 41: exec("cast", ["block", ...args])); cast_block_number (line 57: exec("cast", ["block-number", ...args])); cast_chain (line 73: exec("cast", ["chain", ...args]))

Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.

Tool inputs are validated

71/92 tool handlers declare input schemas (77%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

Only 17/92 tool handlers wrap calls in try/catch (18%)

Wrap each tool handler body in try/catch and return a structured error response.

Tests exist

No test files found

Add tests that exercise each declared tool.

Shell command execution

5 child_process calls — runs shell commands

Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.

Production dependencies are patched

0 critical, 1 high severity in production deps — @modelcontextprotocol/sdk@1.25.3 (high)

Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.

Tool description accuracy

29 tools have description/behavior mismatches: cast_block: description implies read-only but handler writes/deletes/executes; cast_block_number: description implies read-only but handler writes/deletes/executes; cast_chain: description implies read-only but handler writes/deletes/executes

Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.