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

With no annotations, the description carries the full behavioral burden. It adds genuinely useful context that data is refreshed daily and reflects the live patch rather than stale training data. It omits, however, any error behavior for an unknown spell or for a call where neither name nor spell_id is supplied (both are optional with zero required params).

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 tight sentences with the lookup keys front-loaded and the freshness caveat as a supporting clause. No filler, nothing to trim.

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 simple two-param lookup with no output schema, the description covers what the tool returns and data currency. It is still missing not-found behavior and the resolution rule for the optional name/spell_id pair, which matters since neither parameter is required.

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 0%, so the description must compensate for both parameters. It clarifies that spell_id is an ID sourced from get_talents and that name is an alternative lookup key, adding real meaning beyond the bare schema. It does not state precedence when both are provided or that the parameters are optional, leaving a gap for a 0-required-param tool.

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 (Get) and resource (Blizzard spell details), and names exactly what is returned: 'name and full effect description'. It also distinguishes itself from the other lookup tools by pointing at get_talents as the origin of spell_id.

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 implied via the dual input paths ('by spell id (from get_talents) or by name'), which usefully tells the agent where IDs come from. However, there is no explicit when-to-use statement, no exclusions, and no guidance on which of the two optional params to prefer.

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