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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds essentially nothing behavioral beyond that – no hint that it requires a pre-resolved place_id or what depth of detail returns – but an output schema exists, so return format need not be described.

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 front-loaded sentence with the operation, the resource, and the required input – no filler.

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 one-parameter detail tool with a full output schema, the description covers what it does and its input adequately. The notable gap is the absence of any pointer on obtaining a place_id or when to prefer it over the search/photos/reviews siblings.

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 the baseline is 3, but the schema only labels the field 'Resource identifier' while the description specifies it is a place_id. That clarification of the otherwise-generic id field is genuine added meaning.

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?

Uses a specific verb (returns) and resource (detailed place information) and names the key input (place_id). It clearly reads as a detail-lookup, but never distinguishes itself from siblings like google_map_place_photos, google_map_place_reviews, or google_map_search, so an agent must infer the division of labor.

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?

There is no when-to-use guidance, no mention of where a place_id comes from (e.g. google_map_search), and no exclusions relative to the sibling place/photos/reviews tools. Usage is only weakly implied by the required place_id.

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