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

With readOnlyHint and idempotentHint already declaring the safety profile, the description adds the non-obvious point that results may be stale unless refresh=true re-reads Google now — a behavioral detail the annotations cannot convey. It does not cover edge cases such as a missing or unverified Google location.

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?

Front-loaded with what is returned, then the usage rule, then the refresh tip; no filler sentences. The long parenthetical field list is dense but each item is informative, so it earns its space.

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?

There is no output schema, so enumerating the returned Google fields, website fields and the comparison is necessary and done well. Gaps remain around preconditions (location connected/verified) and behavior when the website field is absent, but the core contract is complete.

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 67%; site_id and user_goal are documented in the schema, but the refresh parameter has no schema description. The description compensates by explaining that refresh=true re-reads Google immediately, implying a cached default — meaning added beyond the schema.

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 resource (Google listing vs website) and enumerates the exact fields compared, so an agent knows this is a read-and-diff tool, not a status or summary tool. It is slightly weakened by referring to 'a profile_update', which is not an actual sibling name (the siblings are prepare_google_change / approve_google_change), leaving the hand-off target implicit.

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 gives a clear sequencing rule: call this before proposing a profile update so the owner sees both values. That is real when-to-use guidance. It stops short of naming alternatives (e.g. get_google_business_summary or prepare_google_listing) or stating when not to use it.

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