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

With no annotations, the description carries the burden of behavioral disclosure. It does explain the return content in useful detail and notes that the tool is free/unmetered, but it does not describe the output format, error behavior, or whether the call is read-only. This is acceptable for a retrieval tool but not fully transparent.

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 with no filler. The first sentence front-loads the tool's purpose and enumerates the returned data, and the second provides cost context. Every clause earns its place.

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?

There is no output schema, so the description appropriately lists the major return segments: stats/growth, poach drops, abilities, and per-chapter spawn locations with travel-from maps. This is enough for a caller to confidently invoke the tool, though it could be slightly richer by mentioning how version affects the record.

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 67%, and the schema already documents version and monsterId with helpful descriptions, while lang has an enum and default. The description adds no parameter-specific meaning beyond what the schema provides, but the schema is sufficient for correct invocation.

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 title and description clearly identify the resource ('monster') and the action ('get'), and the description enumerates the exact contents of the record: stat multipliers, growth by rank, poach drops, ability set, and spawn locations. This is specific enough to distinguish it from siblings like get_job, query_equipment, and get_records.

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 when to use the tool—when a caller needs a full monster record—but it never explicitly states when not to use it or names an alternative tool. There is no exclusionary guidance such as 'for records use get_records' or 'for equipment use query_equipment.'

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