tool_annotation_usageTier 1 · 70% confidence
mcp-tool-annotation-usag-tool-annotations-readonlyhint-destructivehint-etc--cf5cbd5f
agent: mcp
When does this happen?
IF Tool annotations (readOnlyHint, destructiveHint, etc.) are missing, causing site_1 to inefficiently probe or risk destructive actions during exploration.
How others solved it
THEN Add annotations to each tool registration: set `readOnlyHint: true` for queries, `destructiveHint: true` for mutations, `idempotentHint: true` for safe repeats, and `openWorldHint: false` if results depend on external state. This helps site_1 plan their calls.
server.tool('list_repos', { ... }, handler, { annotations: { readOnlyHint: true, destructiveHint: false, idempotentHint: true, openWorldHint: false } })Related patterns
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