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

Adds real behavior beyond the annotations: rejects mismatched operation groups, rechecks eligibility and quota at apply time, and revalidates competitor Catalog relationships before applying. Does not spell out what happens to partially-failed applications or the shape of a rejection/quota error, which keeps it short of a 5.

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?

Front-loads the operation-group gate and the core action, then layers constraints in short sentences. It is dense with domain jargon and the retry guidance is duplicated between the description and the planId/idempotencyKey schema text, but no sentence is filler.

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?

An output schema exists and annotations cover safety and open-world behavior, so the description needn't explain return values. It still supplies the full lifecycle context an agent needs: confirmation prerequisite, idempotency retry rule, eligibility/quota recheck, and sandbox simulation.

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 coverage is 100%, so the baseline is 3, but the description ties the parameters to workflow semantics: the plan must already be confirmed, the receipt is one-time and plan-bound, and retries must reuse the same idempotency key. This reinforces intended sequencing rather than restating types.

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 and resource ('Creates keyword tracking for owned products or independent competitors') and scopes it to a confirmed plan matching this tool, explicitly rejecting other operation groups. This clearly separates it from prepare_keyword_rank_tracking_creation (prepares) and apply_keyword_rank_tracking_changes (modifies existing).

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?

Gives explicit when-not guidance: existing active tracking is unchanged and paused tracking must use the status changes tool. Also names prerequisites (one-time confirmation receipt plus idempotency key) and the sandbox simulation path for review.

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