get_font_details

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

No annotations are present, so the description carries the full burden. It discloses what information is returned (category, variants, subsets, etc.) and implies a safe read operation via 'Get'. However, it does not mention response structure, error behavior, or any rate limits, which leaves some behavioral gaps for a tool with zero annotation coverage.

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 action ('Get full metadata') and then lists specific fields. Every word earns its place; there is no filler or repetition of schema information.

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 simple one-parameter read tool, the description covers the core purpose and return data. It lacks an explicit output format (e.g., JSON object), but the field list is a reasonable substitute given the straightforward nature of the tool and the absence of complex requirements.

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 the schema already explains the 'family' parameter with an example and case-insensitivity. The description adds context about the resource type (Google Fonts) but does not add meaningful parameter semantics beyond the schema, so the 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?

Description states a specific verb ('Get') and resource ('full metadata for a Google Fonts family'), and enumerates the specific data fields returned (category, variants, subsets, version, last modified date). This clearly distinguishes it from siblings like search_fonts and get_embed_code.

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 makes clear when to use this tool: when you need full metadata for a specific font family. It does not explicitly name alternatives or state when not to use it, but the context is unambiguous enough that an agent can infer the choice between this and search_fonts.

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