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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety profile is covered and the description only needs to add context. It contributes the return content (one summary line per channel/framework), which is genuine added value, but says nothing about how many entries exist, whether the catalog is stable, or how the entries map to the other tools.

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 sentence with no filler, front-loaded with the verb and scope, and the trailing clause about the per-entry summary earns its place by describing the payload. Nothing could be cut without losing information.

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 catalog tool with full annotation coverage and no output schema, the description supplies enough: what is listed and what each item contains. It stops short of explaining how the listed channels connect to get_first_customer_playbook or find_launch_destinations, which would be the last piece an agent needs to chain calls confidently.

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 the baseline is 4 and there is no parameter meaning for the description to compensate for. Nothing in the description misrepresents the argument list, which the schema correctly shows as empty with additionalProperties false.

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?

A specific verb ("Lists") paired with a concrete resource ("every channel playbook and launch framework First Sale Scout covers") and the shape of each entry (a one-line summary of when it wins customers). It implicitly contrasts with the get_*-style siblings by being the enumerating catalog, but never names them, so the differentiation is inferred rather than stated.

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?

A glance at the description makes clear this is the discovery/catalog tool you'd call before drilling into a single playbook, and the summary-per-entry hint implies scanning to shortlist. There is no explicit instruction such as "call this first, then use get_first_customer_playbook for a chosen channel," and no stated exclusions or prerequisites.

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