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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered by structured fields. The description usefully adds content framing (free, 30-day, one-per-bottleneck) and the intended two-step workflow, but says nothing about the shape or ordering of the returned list. Given annotation coverage, a 3 is appropriate.

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?

Two sentences, front-loaded with the resource definition and closed with the usage condition and routing. Every clause carries information; nothing is redundant with the title or annotations.

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?

For a zero-parameter, read-only list tool with no output schema, the description supplies everything an agent needs: what the list contains, the categories it covers, when to call it, and which tool to call next. Nothing material is missing.

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?

The tool takes zero parameters, so there is no parameter surface to document and the baseline is 4. The description does add meaning about what the call yields (the five bottleneck categories), which is the closest thing to 'inputs' this tool has.

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 the concrete resource (Agency Growth's free 30-day playbooks) and its organizing principle (one per growth bottleneck), then enumerates the five bottlenecks. It also names the sibling get_playbook as the follow-up, so an agent can distinguish the list step from the retrieval step without opening either 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?

Explicit trigger condition ("Use when an agency owner asks what to fix first or how to fix a stall in one of those areas") plus an explicit next step ("then call get_playbook"). Both when-to-use and the alternative/routing are stated rather than inferred.

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