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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the safety profile is partly covered, and the description adds only what a place conceptually is. Critically, it omits that the operation takes an approval_id tied to a 'human-approved exact tool request' with single-use semantics – a significant approval workflow an agent should know before calling a mutating tool.

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?

A single efficient sentence with no waste, front-loaded on the trigger condition. It is slightly odd that it describes only the trigger rather than explicitly stating the action ('creates a new 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?

The tool has an output schema, so return values need not be explained, and all params are covered in the schema. However, for a mutation taking an approval_id tied to a human-approval flow, the description is thin on the workflow and on how places relate to the sibling address tools.

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%, so all eight parameters are documented in the schema itself, including the notable approval_id semantics. The description's mention of 'address and coordinates' adds only marginal mapping to what the schema already provides, so the baseline 3 applies.

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 gives a clear verb+resource (save a named place) with concrete examples (favorite restaurant, client's office) and names the data involved (address and coordinates). It does not, however, distinguish this from the sibling addresses.create, leaving the boundary between a 'place' and an 'address' unresolved.

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?

It supplies a trigger condition ('when the user wants to save a named place'), which implies usage but offers no exclusions and no alternative tools. An agent must infer whether addresses.create or places.update is the right call in edge cases.

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