Load Swagger/OpenAPI Spec

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

Beyond annotations (readOnlyHint, destructiveHint), the description explains in-memory storage, unique name assignment with numeric suffix for duplicates, and error behavior for unreachable URLs, invalid JSON, and unsupported YAML. This adds meaningful behavioral context.

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?

The description is well-structured with clear sections (Args, Returns, Examples, Error Handling) and front-loaded with a one-sentence summary. While detailed, every section adds necessary information for a tool that is a prerequisite for all others.

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?

The description provides a complete return object schema, explains the tool's role in the overall workflow, and covers likely failure modes. Since there is no output schema, this level of detail is necessary and fully provided.

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?

Both parameters are fully described in the input schema (100% coverage) with examples and usage notes. The description duplicates these details but does not significantly add to parameter semantics beyond what the schema provides, so the baseline of 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?

The description uses a specific verb ('Load and parse') with a clear resource ('OpenAPI/Swagger specification document from a URL'), and the sibling context (e.g., swagger_load_local_spec) shows this tool is the URL-based loader. This clearly distinguishes it from siblings that list tags/paths or load local specs.

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?

The description explicitly states 'You must load a spec before using any other tools,' providing a mandatory usage context. It also covers when auth_header is needed and gives examples for common requests, though it doesn't explicitly mention swagger_load_local_spec as an alternative—the URL-vs-local distinction is implied by the tool name and description.

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