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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive), and the description adds real behavioral context: it works without an API key via keyless mode with no sign-up, and the key is only used to fill in a value. It also discloses what the response contains (command, code, file placement).

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?

The core deliverable is front-loaded in the first sentence, with the keyless/key caveat in a short second sentence. It is dense but every clause carries information; no wasted padding.

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, the description carries the return-value burden and does so well (install command, code, file placement). Combined with full schema coverage and read-only annotations, an agent has nearly everything needed, though it lacks explicit sibling routing.

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%, so the schema already documents apiKey, framework, and firstPartyPath thoroughly. The description only marginally extends this by framing omission of apiKey as 'keyless mode', which justifies the baseline 3.

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 a specific verb+resource: returns the exact install command and code to add TraceTail fingerprinting to an app in the given framework, including file placement. This is clearly distinct from siblings like get_pricing, create_setup_link, or search_docs.

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 by the purpose (call it when you need integration code for a framework), and the keyless/API-key note gives some context, but the description never states when to prefer this over check_setup_link or read_docs_page, nor any prerequisites or exclusions.

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