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

With no annotations, the description carries the full behavioral burden. It discloses the data returned, the meaning of a missing badge, and that it never starts a check or submits a request, effectively communicating a read-only, non-mutating operation. It does not cover authentication or error behavior, but for a simple read tool this is decent.

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?

Three sentences, front-loaded with the core read action, then absence semantics, then a non-mutation guardrail. No redundant or filler text; every sentence earns its place.

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 single-parameter read tool with no annotations or output schema, the description covers what is read, absence semantics, and non-actions. It lacks explicit return format or error details, but given the simple scope it is largely complete.

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 fully documents the single 'route' parameter (exact route ID, domain, or published guide slug). The description only echoes 'domain or route ID' without adding format, constraints, or examples beyond what the schema provides.

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 ('Read') and resource ('official route variants... current independently checked scope, actor and region, capture time, expiry and failures'). It distinguishes itself from write-oriented siblings by stating 'never starts a check or submits a request,' though it does not name read alternatives such as get_removal_route.

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?

Provides context ('No badge means the route is not currently verified') and explicitly excludes initiating checks or submitting requests, which implies when to use it. However, it does not state when to prefer this over sibling read tools like get_removal_route or get_library_verification_status.

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