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

With readOnlyHint=true already covering safety, the description adds genuinely new behavior: results are sorted by event date rather than creation date, only shared team-visible annotations are returned, and global SEO/industry annotations may be mixed in. It also links team annotation ids to update-annotation, which the annotations alone would not reveal.

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?

Purpose and scope are front-loaded in the first sentence, followed by return semantics and a useful cross-tool note. It runs seven sentences and the update-annotation remark is somewhat tangential, but every sentence carries information rather than 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?

There is no output schema, so the description carries return-shape duty and does it: sort order (event date, newest first), visibility scope (shared only), content mix (team + global), and the id field's downstream use. Combined with fully documented parameters, an agent has what it needs to call and interpret this tool.

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 100%, so the schema already documents limit defaults/caps, property lookup, categoryId filtering, and the includeGlobal default behavior. The description reinforces the team-vs-global distinction but adds no syntax, format, or constraint detail beyond the schema, 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?

States a specific verb and resource ('get the most recent annotations') and scopes it with 'without specifying a date range,' which implicitly separates it from date-range based siblings like get-custom-annotations. It does not name any sibling explicitly, so it falls short of full differentiation.

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?

Gives concrete trigger examples ('get the last 10 annotations', 'show recent events that might affect traffic'), which clearly signals the intended context. It never states when not to use it or names the alternative tool for filtered/historical queries, so no exclusions are provided.

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