GreetingTool

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

The description claims a non-destructive, deterministic action, but annotations indicate destructiveHint=true and openWorldHint=true, implying potential side effects. The description does not clarify this contradiction, leaving the agent uncertain about tool behavior.

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 a single sentence with no filler, achieving high conciseness. However, it could be slightly expanded to improve clarity without being verbose.

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, no parameter descriptions, and annotations that contradict the description, the tool definition is incomplete. The agent lacks understanding of return values, behavioral details, and proper usage.

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%, and the description does not mention the 'name' parameter at all. While the parameter is self-explanatory, the description fails to add any semantic value beyond the schema.

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 'Return a deterministic greeting for a Habitica MCP caller,' which clearly identifies the verb (return) and resource (greeting) with context. However, it could be more specific about the nature of the greeting.

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?

No usage guidance is provided. There is no mention of when to use this tool, prerequisites, or alternatives. With no siblings, differentiation is not needed, but the absence of context for invocation reduces clarity.

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