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

Annotations already declare readOnly, idempotent, non-destructive and closed-world behavior, so the safety profile is covered. The description contributes 'Free.', a cost note not present in annotations, plus the pre-search validation intent. It does not disclose failure behavior for malformed postal codes or what the response contains, which would be valuable for a resolution endpoint.

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?

Three short sentences with no padding, and the accepted input formats are front-loaded. The opening word 'Place' is awkward and slightly obscures rather than clarifies the action.

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?

For a single-parameter, annotation-rich tool this is close to adequate, but with no output schema the description should say what comes back (coordinates plus perhaps a normalized address) and how invalid input is handled. The cost and pre-search guidance help, but the return contract is left implicit.

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% and the schema's own parameter description already enumerates the three accepted formats with examples, so the description adds no syntax beyond it. Baseline 3 applies when the schema carries the semantics.

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 the accepted input forms (Canadian postal code, FSA, or lat,lng) and implies a coordinate conversion via 'as coordinates', but the verb 'Place' is garbled and the actual operation is never stated plainly. It also does not differentiate itself from plausible siblings such as coverage or stores_near, so an agent must infer that this is a geocoding/resolution tool.

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?

'Use it to check a location before searching' gives explicit sequencing guidance and a clear precondition for calling it. It stops short of naming alternatives or stating when not to use it (e.g., when coordinates are already known and stores_near can be called directly).

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