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

With no annotations, the description carries the full behavioral burden and does so well: it discloses 'Read-only; sends nothing' (no side effects) and the API-key requirement. It stops short of rate limits, failure modes, or delivery format, but the safety profile is genuinely covered.

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 a colon-delimited inventory of report contents; every clause earns its place. It is slightly dense as one run-on, but there is 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?

With no output schema and no parameters, the description fully compensates by enumerating the report's contents and stating the read-only nature and auth need. An agent has everything required to call it correctly.

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?

Zero parameters, so the baseline of 4 applies; there is nothing for the description to clarify beyond confirming the tool takes no input, which the empty schema already conveys.

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?

Names a specific verb (summary) and resource (last 7 days), then enumerates exactly what the report covers: stuck points by kind/site, requests sent vs. would-have-been, human answers and latency. This is clearly distinguishable from siblings like check_request and usage_and_upgrade without opening any schema.

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?

Usage is implied (pull a periodic activity summary) and the auth prerequisite 'Needs a free API key' is stated, but there is no explicit when-to-use or when-not wording, nor any pointer to alternatives such as usage_and_upgrade for billing/upgrade needs. Adequate but leaves routing to inference.

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