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

Adds real value beyond annotations by disclosing the auth requirement ("Requires your Gillby account and explicit account consent") and the concrete idempotent behavior ("Repeat deletes return deleted=false"), even though idempotentHint already signals idempotency. However, the trailing "Units: ft, kt, s, F, mi... Returns data and source/freshness metadata" reads as copy-pasted boilerplate that does not fit a delete operation and risks misdescribing the result.

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 first sentence is well front-loaded (purpose, idempotency, auth). The second sentence about units and metadata returns is off-topic noise for a delete tool and dilutes the definition rather than earning its place.

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?

Annotations already cover the destructive/idempotent safety profile, and the description usefully adds the consent requirement. But with 0% param documentation, no output schema, and a misleading boilerplate tail, it is only partially complete for a destructive mutation.

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% and the single nested path.id parameter is never explained — nothing states that path.id is the saved place's identifier or what values are valid. The description does not compensate for the coverage gap, leaving the only required input semantically opaque.

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?

"Delete a saved place" is a specific verb+resource that clearly contrasts with the save/update/get/list_my_place siblings in the family. It stops short of naming an alternative explicitly, but the action is unambiguous.

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?

No guidance on when to use this versus update_my_place or save_my_place, and no prerequisites for invoking it. The idempotency note is behavioral, not a routing hint, so the agent gets no when/when-not framing.

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