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

Annotations already establish readOnly, idempotent, non-destructive, and non-open-world behavior, so the safety profile is covered. With no output schema, the description's enumeration of the returned payload (counters, trainer count, weaknesses, catch CP) adds genuinely useful behavioral context an agent cannot get elsewhere.

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?

Two sentences, no filler. The return-value summary is front-loaded and the parameter guidance follows immediately, so an agent can extract both the capability and the invocation detail in a single pass.

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?

With no output schema, the description correctly compensates by naming the outputs, and the tier default is documented in the schema. What is missing is positioning relative to the sibling counter/list tools, which would help an agent choose correctly among the six raid-adjacent tools.

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%, so the schema already documents both parameters and the baseline is 3. The description adds concrete boss-value examples (dialga, giratina-origin, mewtwo-mega-x, shadow-raikou) that illustrate the accepted ID format, but says nothing about the tier parameter or its default.

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 states a specific resource and enumerates exactly what the tool returns: best counters, required trainer count, weaknesses, and catch CP for one raid boss. That is far more specific than the name alone, though it never differentiates itself from sibling tools like max_counters or pokemon_info, which an agent could plausibly confuse it with.

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: 'for one raid boss' suggests the caller already has a specific boss in mind, which implicitly separates it from list-style tools such as raids_now. There is no explicit when-to-use, when-not-to-use, or reference to the sibling max_counters that likely handles a different battle type.

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