Get library guidance

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds useful context about the returned guidance categories and 'official-source' framing, but does not disclose behavioral details such as lookup failure handling, authentication, or rate limits. With annotations present, this is adequate but not exceptional.

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?

A single sentence that front-loads the core action ('Return'), names the target ('one ecosystem'), and lists the content categories without filler. Every element contributes meaning and the length is appropriate for the tool's simplicity.

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?

Given the tool has one parameter, openWorldHint=false, and read-only annotations, the description is nearly sufficient. However, there is no output schema, so the exact return structure is not documented, and library_id semantics are left implicit. The listed guidance categories give a reasonable overview, making this minimally complete but with clear gaps.

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 for explaining library_id. The description only says 'for one ecosystem' and does not clarify that library_id identifies the library/ecosystem, how to obtain it, or what format is expected. This is a meaningful gap given there is no schema-level parameter description.

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 clearly identifies the verb ('Return') and the resource ('guidance for one ecosystem'), and enumerates the content categories (use, avoid, compatibility, legal, official-source). It is reasonably distinct from siblings like get_install_instructions and list_libraries, though it does not explicitly differentiate itself and 'ecosystem' versus 'library' is slightly imprecise.

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 tells what the tool returns but does not give any guidance on when to use it versus alternatives such as get_install_instructions, recommend_stack, or search_components. There is no when-to-use, when-not-to-use, or alternative routing, leaving the agent to infer context from the tool name and sibling list.

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