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

Beyond the annotations, it discloses that the brief embeds this workspace's key, covers tag placement, sign-up and purchase calls, consent, and verification through Ads → Sales. "Read only" merely repeats readOnlyHint, but the workspace-specific output and handling instructions add useful context.

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 deliverable and audience are front-loaded, and the detailed list earns its space by covering events, consent, verification, and supported frameworks. The redundant "Read only" sentence and densely packed opening slightly reduce efficiency and scanability.

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-argument, read-only tool with an output schema, the description covers the deliverable, workspace scope, essential contents, framework coverage, verification path, and handoff instructions. It provides enough information to select and invoke the tool without needing to explain the return schema.

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?

There are no parameters, so the empty schema already fully describes invocation and establishes the baseline score. The phrase "this workspace's key" usefully implies that the tool operates in the current workspace without requiring an input.

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?

It clearly defines the resource and deliverable: a complete Sales tracking setup as a Markdown brief for the site's developer. It does not explicitly distinguish itself from siblings such as ad_conversions or siren_help, and a direct verb such as "returns" would make the operation clearer.

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?

The developer-handoff framing and instruction to pass `markdown` through unchanged or save it as SIREN-TRACKING.md provide concrete usage context. It does not explain when not to use the tool or name an alternative for conversion reporting or troubleshooting.

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