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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds useful behavioral context by specifying what comes back per result (trust score 0-100, overall score 0-10, 30-day uptime, PanelCompare page link), which matters since there is no output schema. It omits result-count/pagination behavior and any rate-limit or cost notes.

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, front-loaded with the verb and resource, then the filter/ranking options and return fields. No filler and no repetition of the title.

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, describing the returned fields is exactly the right compensating detail, and the filter/ranking coverage is broad. Remaining gaps are modest: default and maximum result count, and what the sort modes actually mean, would let an agent call it correctly on the first try.

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 a high 71%, so the documented filter params (query, feature, payment, minTrust, platform) already carry their own examples. The description restates the filter dimensions but does not explain the sort enum values ('best', 'services', 'rating', 'newest' are not mapped to the described ranking by score/price/trust/uptime) nor the limit cap of 25, so it adds only marginal meaning.

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 ('Find SMM panels ... tracked by PanelCompare') and even glosses the domain term for agents unfamiliar with it, plus the ranking and filtering capabilities. It never names a sibling tool, so the agent gets no explicit contrast with get_panel or list_services, which keeps it short of a 5.

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?

'optionally filtered by platform, payment method, feature or minimum trust score' implies how to use the filters but gives no when-to-use guidance. There is no statement about when to prefer this over get_panel (single-panel lookup) or market_stats, and no note that all filters are combinable.

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