Retrieve Stored Prayer Preferences

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is fully covered. The description adds the 'currently active' qualifier, which clarifies that the result reflects current settings rather than historical ones, but otherwise adds little behavioral detail beyond the annotations.

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 concise and front-loaded with the primary action and resource. The phrase 'Read-only operation' is slightly redundant given the annotations, but the overall structure is clear and efficient.

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 single-parameter read-only retrieval with full schema coverage, annotations, and an output schema, the description is complete. It tells the agent what the tool returns, that it is read-only, and the userId parameter is fully documented in the schema.

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 description coverage is 100%, and the only parameter, userId, is already described as a 'Unique user identifier' in the schema. The description does not need to add parameter meaning because the schema fully covers it.

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 uses a specific verb ('Returns') and a precise resource ('currently active calculation settings and preferences for a user'), clearly distinguishing this tool from siblings like get_today_prayer_times or get_prayer_status. The title reinforces the purpose as retrieving stored prayer preferences.

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 clearly indicates this is the tool to use when retrieving a user's current calculation settings and preferences, and the 'Read-only operation' statement clarifies it is for reading rather than configuring. It does not explicitly name alternatives or exclusions, but the context is clear enough for an agent to select it appropriately.

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