get_stats

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

No annotations provided, so description must cover behavioral traits. Only states it returns aggregated statistics (top domains, daily breakdown) and period parameter. No mention of authentication, rate limits, data freshness, or whether it mutates state.

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?

Very concise: two sentences plus argument documentation. Front-loads main purpose. Could benefit from slightly more structure or a brief usage note, but efficient.

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 output schema exists, return values need not be documented. However, lacks contextual info like data time range, source scope, or limitations. Acceptable for a simple stats tool but could be more 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?

With 0% schema description coverage, description adds critical meaning: lists valid values for 'period' (day, week, month) and explains its purpose. Schema only had type string with default 'week', so description provides essential usage info.

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?

Clearly states 'browsing activity statistics — top domains and daily breakdown', specifically identifying verb and resource. Differentiates from siblings like get_activity and get_timeline which likely deal with raw data or timelines.

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 explicit guidance on when to use this tool vs siblings (e.g., get_activity, search_history). Does not provide when-not or alternative recommendations.

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