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

Annotations already declare destructiveHint=true, readOnlyHint=false and idempotentHint=true, so the safety bar is lower. The description adds a useful ownership constraint ('a note of yours'), but does not say whether the note itself is deleted or merely removed from the board, or whether the action is reversible — the key question for a destructive call.

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?

Two short sentences, action first, prerequisite last, with zero filler. Nothing could be cut without losing information.

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 only one required parameter, full schema coverage, and no output schema, the description plus structured fields cover most of what an agent needs. The remaining gap is the outcome of the call (does the note survive?) for a mutation flagged destructive.

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?

Schema coverage is 100%: the id, key and idempotency_key parameters are all fully documented in the schema, including the API-key-in-transcript warning. The description's 'by its id' only restates the schema, so baseline 3 is correct.

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?

States a concrete verb ('take ... down from the notice board') plus the resource ('a note of yours') and the identifier ('by its id'), so the agent knows exactly what the call does. The pairing with the sibling 'pin' is implicit rather than named, so it stops short of a 5.

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?

'For members' supplies one gating condition, which is real usage context. However, it never states when to unpin rather than leave a note pinned, what to do if the note is not yours, or what error surfaces for non-members — the agent has to infer all of that.

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