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

With no annotations, the description carries the burden; it usefully discloses that this is a non-executing selection step, which is real behavioral value. However, it says nothing about whether it is read-only, whether it mutates any stored route state, or about rate/cost implications.

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 waste, and the non-execution caveat is placed immediately where it matters for tool selection.

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?

Return values are covered by the output schema and both params are documented, so the description only needs the routing context it provides. Minor gap: it never states that discovery must precede it, which an agent sequencing three sibling tools would want.

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% and both parameters ('query', 'limit') are documented in the schema, so the description adds essentially nothing beyond the natural-language framing of 'for a request'. Baseline 3 applies.

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 ('compare') and resource ('discovered providers for a request') plus the outcome ('select the strongest route candidate'). It implicitly separates itself from execute_capability via 'does not execute', though it never names its siblings explicitly.

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?

'Discovered providers' implies discover_capabilities must run first and the exclusion of execution implies a choice against execute_capability, but neither alternative is named or conditioned explicitly. Usage context is inferable rather than stated.

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