cat_facts

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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint and destructiveHint=false, so the safety profile is fully covered elsewhere. The description adds the fact that results are paged, but says nothing about page numbering, default page, or result ordering.

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 short sentence with no filler, with the operation and its pagination nature front-loaded.

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 trivial read-only list tool this is close to adequate, but with no output schema the description should at least hint at what a 'fact' object looks like or how many pages exist. The undocumented page parameter remains an unresolved gap.

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 coverage is only 50%: 'limit' is fully documented in the schema (max 50, default 5) while 'page' has no description anywhere. The phrase 'with pagination' gestures at the page parameter but never clarifies whether it is 0- or 1-based or what the default is, so the description does not compensate for the gap.

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 and resource ('Get multiple cat facts') with an additional scoping detail (pagination). The word 'multiple' implicitly distinguishes it from the sibling cat_fact, but the differentiation is never made explicit.

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?

Usage is only implied: 'multiple' hints that this is the bulk variant versus cat_fact, but the description never says when to pick this over cat_fact or cat_breeds. No exclusions or alternatives are named.

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