compare_monsters

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

No annotations present, so description carries burden. It discloses that the tool shows specific monster attributes, implying read-only behavior with no side effects. However, it lacks details on authentication, rate limits, or performance implications. Still, it is reasonably transparent for a read-only comparison tool.

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 effectively convey the purpose and output. Front-loaded with the action (compare) and resource (monsters), then lists displayed fields. No unnecessary words.

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?

Given no output schema, the description compensates by listing output attributes. It covers the key comparison aspects for a monster tool. However, it omits potential return format, ordering, or error handling. Still, sufficient for its simplicity.

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 has 100% coverage with a parameter description. The description adds value by explaining the tool's output (AC, HP, etc.) beyond the schema, enhancing understanding of what the parameter drives. However, it does not provide additional constraints or format details.

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 clearly states the tool compares 2-3 D&D 5e monsters side by side, listing specific attributes shown (AC, HP, etc.). It distinguishes itself from siblings like search_monsters (which likely finds monsters) by focusing on comparison.

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 usage when a side-by-side comparison is needed, but it does not explicitly state when to avoid this tool versus alternatives (e.g., search_monsters for single monster details or build_encounter for encounter building). No exclusions or when-not guidance provided.

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