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

Beyond the annotations, the description discloses three behaviors an agent could not infer: input length limit of 1000 characters, no persistence of the input, and a per-day answer quota. The readOnlyHint=false annotation isn't contradicted, since the tool is not a pure read, and the description clarifies the ephemeral nature of the submitted text.

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?

Four short sentences, each carrying distinct information (input format, response source, privacy, rate limit), with the input instruction front-loaded. Nothing is wasted, though phrasing is informal rather than structured.

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 single-parameter tool with no output schema, the description covers what to send, how it is processed, what is not retained, and the rate limit. Only the shape of the returned answer is left unstated, which is minor here.

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 already 100%, so the baseline is 3, but the description adds real meaning beyond the schema: it specifies plain text and a 1000-character cap, constraints the schema's 'What weighs on you' string does not carry.

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 names a specific action (write what weighs on you) and the response source (a language model answering in the spirit of the sermons), which tells an agent exactly what the tool produces. It is distinguishable from the siblings by the interactive, question-answering nature, though it never names the alternatives explicitly.

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 rather than stated: the agent can infer this is for personal concerns when the other tools (blessings, wall, sermons) don't fit. There is no explicit when-not-to-use guidance or named alternative for cases where a blessing or sermon reading would be more appropriate.

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