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

With no annotations provided, the description carries the full burden of behavioral disclosure. It implies a read-only operation ('Get') and lists the types of data returned, but it does not disclose details like default date ranges, pagination, or potential errors. This meets the minimum viable level but lacks richer behavioral context.

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?

The description is a single, front-loaded sentence that efficiently states the purpose and primary return data. It contains no wasted words, though it could be slightly more structured to include usage guidance or defaults.

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?

Given the absence of an output schema and annotations, the description is on the minimal side. It covers basic functionality and return types, but omits how it relates to sibling analytics tools and lacks details on the default period or range handling. For a simple read-only tool, this is adequate but not comprehensive.

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 fully documents all parameters. The description only adds 'for a given period' which loosely references the period/to/from parameters but does not add meaningful extra meaning beyond what the schema already provides.

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 clearly identifies the tool's purpose with a specific verb ('Get') and resource ('analytics data for a Measure.events site'), and lists specific return types (pageviews, top pages, referrers). This is more detailed than a generic 'get analytics', but it does not explicitly differentiate from sibling tools like get_insights or get_site_summary.

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?

No guidance is provided on when to use this tool versus the similar sibling tools get_insights and get_site_summary. The description does not mention any context, prerequisites, or exclusions, leaving the agent to infer usage purely from the name.

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