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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds real value by enumerating the possible outcomes (free, subscriber, lifetime, purchased, unauthorized) — that is return-value behavior not covered by any output schema. It does not say what happens for an unknown slug, whether auth is required, or rate limits, keeping this at a solid 3 rather than higher.

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 compact sentence with the outcome taxonomy front-loaded, and no padding. The wording is slightly fragmented ('and why: free, subscriber...') but every clause carries 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 one-parameter read-only check with no output schema, the description supplies the essential missing piece — the set of possible verdicts and reasons — which is what an agent needs to interpret the result. Nothing critical is omitted beyond error/auth edge cases.

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% and there is only one required parameter, so the schema already explains 'slug'. The description echoes the accepted resource types (component or template), which adds a little meaning but no format or lookup guidance beyond the schema. Baseline 3 applies.

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 check ('whether the caller can take a component or template') plus the reason dimension, which is more than a restatement of the name. It is distinguishable from siblings like get_component or get_template, though it does not explicitly name those alternatives.

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 only implied: an agent can infer this is an entitlement gate to call before fetching or installing a component/template. There is no explicit when-to-use, no stated prerequisites (e.g. caller identity), and no routing statement against get_component or get_installation.

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