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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the 'This is destructive' clause largely restates structured data. The genuinely additive disclosure is 'requires approval by default', which tells the agent an approval flow (matching the approval_id parameter) gates execution — useful context the annotations do not carry. It stops short of saying what exactly is destroyed or whether the deletion is reversible.

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 with zero filler; the destructive/approval caveat is front-loaded immediately after the intent trigger, so an agent can act on it without scanning further.

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 no explanation, and the annotations plus description together cover the safety profile and the approval gate. For a simple two-parameter delete, nothing essential to invoking it correctly is missing; the only soft spot is the vagueness of 'by default'.

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 100% and both parameters are documented in the schema, so the baseline of 3 applies. The description only loosely alludes to the approval mechanism without explaining call_id or approval_id semantics beyond what the schema already states.

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 names a specific verb (removed) and resource (logged call), so an agent knows this deletes a call record rather than modifying it. It is phrased as a user-intent trigger rather than a crisp 'Deletes X' statement, and it does not explicitly contrast with siblings like calls.update, so it falls 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?

'When the user wants a logged call removed' gives an implied trigger condition, which is better than nothing. However, it names no alternative (e.g., calls.update for modifying, or whether soft-delete/archive exists) and states no when-not-to-use condition, so guidance is only implied.

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