spring_initializr

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

With no annotations provided, the description carries the full burden and does reasonably well: it discloses that no version is hardcoded and content is whatever Initializr serves today, that output is truncated to `max_tokens`, and that failures return {"error", "suggestion"}. It omits auth/rate-limit considerations, but the disclosed truncation and error-shape behavior are genuinely useful.

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?

Front-loads the core purpose in one line, then uses parallel `section=` blocks that are easy to scan. Slightly more verbiage than strictly necessary, but each section earns its place by describing a distinct mode.

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 read-only metadata tool with no output schema, no annotations, and zero schema coverage, the description covers both return shapes (options payload and truncated catalogue) and the error contract, which is enough for an agent to call it correctly. Only external concerns like auth or pagination beyond `max_tokens` are absent.

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 0%, so the description must compensate and largely does: it defines both enumerable `section` values with their contents, specifies that `query` matches over id/name/description/group/reference-doc-link, and explains `max_tokens` as the truncation limit. This adds real meaning beyond the bare schema.

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+resource (read Spring Initializr's own metadata) and clearly enumerates the two operational modes via the `section` parameter, mapping each to distinct content (options vs dependency catalogue). It does not, however, differentiate itself from siblings like spring_versions or spring_dependency, which an agent could easily confuse with this tool.

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 explains what each `section` value returns and that `query` filters the catalogue, which implies when each mode is appropriate. But it gives no explicit when-to-use guidance against the many related siblings (spring_dependency, spring_search_concepts, spring_versions), leaving the routing decision to inference.

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