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 agent knows this is a safe, non-destructive operation. The description adds the specific data categories returned and the name/ID lookup, providing some context, but it does not disclose potential errors, rate limits, or any edge cases. Thus it adds only moderate value beyond the annotations.

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 two sentences: the first clearly states the tool's purpose and the second explains the lookup method. It is front-loaded, concise, and contains no filler or repeated information from the schema.

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?

This is a simple, single-parameter lookup tool with a rich output schema and comprehensive annotations. The description covers its purpose and usage adequately; because an output schema exists, there is no need to describe return values. It is complete for its complexity.

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?

The input schema has 100% coverage and already describes the 'name' parameter as accepting a Pokémon name or numeric ID, with examples. The description repeats this same information without adding any new semantic details, so it does not compensate or expand beyond the schema. A baseline of 3 is appropriate.

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 ('Get') and resource ('a Pokémon') while enumerating the exact data returned (stats, types, abilities, height, weight, sprites). It also states the dual lookup method (name or ID), which clearly differentiates it from sibling tools like get_ability, get_type, or get_evolution_chain that target specific sub-resources.

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 implies the tool is for retrieving core Pokémon information but does not explicitly say when to use it over alternatives or when not to use it. It mentions the lookup methods but gives no exclusions or comparisons with related tools, leaving selection partially to inference.

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