AgentSEO SERP Volatility Monitor

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

Annotations already declare destructive=true, idempotent=false and readOnly=false, and the description reinforces this with a concrete consequence: credits are consumed and repeating the call can create new charged work. That is exactly the kind of cost/retry context annotations cannot express. It still does not say what is being 'destroyed' for a tool whose inputs are all supplied by the caller, leaving a small ambiguity about why destructive=true applies.

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?

Two sentences, no filler, and the capability statement is front-loaded ahead of the cost caveat. Every clause carries information an agent would otherwise have to infer.

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 an eight-parameter, credit-consuming, non-idempotent analysis with no output schema, the description covers what it computes but not what comes back – no mention of the churn metrics, deltas, or pending-job response shape an agent must handle. The billing caveat helps, but result interpretation is left entirely implicit. It is adequate to call the tool, not to use the result with confidence.

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 every one of the eight parameters, including the nested snapshot objects, is already documented in the schema. The description adds no parameter-level meaning such as ordering requirements for snapshots, how sensitivity thresholds interact, or how target_domains differs from target. Baseline of 3 applies when the schema does all the work.

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?

The first sentence names a specific verb (Compare) plus the resource (supplied SERP snapshots) and enumerates the outputs it produces: rank churn, top-domain churn, feature changes, target visibility movement. That is far more than a restatement of the name. It falls short of 5 only because it never names the nearest sibling (agentseo_analyze_serp, agentseo_rank_track) to say which analysis path an agent should pick.

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 'Compare supplied SERP snapshots' – the agent must already hold at least two historical snapshots, which the schema reinforces. Beyond that there is no explicit when-to-use, when-not-to-use, or pointer to an alternative tool. The credit warning hints at a usage policy (don't loop) but does not tell the agent what to do instead beyond what the sync parameter already spells out.

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