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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false. The description adds value beyond them by disclosing a concrete side effect ('its notification is removed') and a plan-gating prerequisite ('Requires Keeploop Pro'), neither of which is visible in the annotations.

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, front-loaded with the action and its side effect, with the prerequisite tacked on efficiently. Nothing is wasted.

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?

An output schema exists, so return values need not be explained, and annotations cover the safety profile. Still missing is how to locate a valid proposal_id and what happens if the proposal is no longer pending, which matters for a destructive cancel.

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 description coverage is 0% for the single required parameter proposal_id, so the description must carry that burden and does not: it never says what form the id takes or where an agent obtains it. The implied 'pending proposal' semantic is the only hint, which is thin for a fully undocumented required parameter.

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?

'Withdraw a pending proposal' gives a specific verb plus a scoped resource, so it is unambiguous against siblings such as list_proposals, propose_event, and propose_reschedule. It stops short of a 5 only because it doesn't explicitly contrast itself with those proposal-related siblings.

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 word 'pending' implies the action only applies to proposals not yet answered, and 'Requires Keeploop Pro' is a genuine prerequisite. However, there is no stated alternative (e.g. how to locate a proposal id via list_proposals) and no explicit when-not-to-use guidance.

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