update_sync_watchlist

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations provide idempotentHint=true and destructiveHint=false, but the description adds little beyond that. It does mention reading the matching GET or /schema endpoint first, which gives some context about the required workflow, but lacks details on potential side effects, response behavior, or required authentication. With annotations covering some aspects, the description's contribution is minimal.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise: two sentences and an endpoint line. It front-loads the core purpose, then provides a necessary instruction. No redundant content, but the brevity leaves gaps in semantics and usage.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With a nested object body parameter and no output schema (though context signals show output schema exists, it is not provided here), the description does not explain the request structure beyond pointing to external resources. It lacks guidance on the full lifecycle (e.g., prerequisites, response handling) and does not compensate for the generic schema.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema has only one 'body' parameter with 'additionalProperties: true' and no further structure, so schema coverage is 0%. The description says 'Request payload' and tells to read the GET or /schema endpoint to see fields, which is a pointer but not a substitute for documenting the parameter structure. Given high coverage need, the description insufficiently compensates.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb ('Update') and resource ('watchlist'), and identifies the endpoint ('PUT /sync/watchlist'), which clearly indicates the target. However, it doesn't explicitly distinguish from sibling tools like 'update_sync_watchlist_by_list_item_id' or 'create_sync_watchlist', but the resource and verb are specific enough for a clear purpose.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description does not state when to use this tool versus alternatives, nor does it mention any prerequisites or exclusions. It instructs to read the GET or /schema endpoint first, which implies a workflow but does not provide explicit guidance on when to use this specific update operation relative to others.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.