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

Annotations already cover the safety profile (readOnlyHint, idempotentHint, destructiveHint=false, openWorldHint), so the remaining burden is light, but the description adds essentially nothing behavioral beyond 'same as the app shows today'. It does not say what is returned (one line? a full chapter?), whether a reading always exists for a given day, or how it behaves outside the app's configured plan.

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 first sentence duplicates the title verbatim, and the second sentence is a catalog of sibling-tool features (plans, search, verse lookup, whole books) that does not describe this tool's behavior. It is short, but a significant share of the text does not earn its place in this definition.

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 zero-required-parameter read tool with no output schema, the minimum viable information is present: it says what the tool returns conceptually (today's reading, line by line) and leaves the date override to the schema. It stops short of describing the return shape, pagination/line handling, or behavior when no reading exists for the day, which matters because there is no output schema to fall back on.

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 single optional 'date' parameter is fully documented in the schema (YYYY-MM-DD, defaults to today UTC). The description contributes no additional parameter semantics, so the baseline of 3 for high schema coverage applies.

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 a recognizable verb+resource ('Today's reading, line by line') and scopes it to today, so the core purpose is discoverable. However, it never distinguishes itself from close siblings like gita_get_reading, gita_get_verse, or gita_list_readings, and the second sentence instead enumerates capabilities belonging to those siblings (plans, search, verse lookup, whole books), which muddies rather than sharpens the purpose.

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?

There is no guidance on when to choose this tool over gita_get_reading (which presumably takes an explicit date/passage) or gita_get_card. The family blurb mentions other features but attaches no conditions or exclusions to any of them, so an agent must infer the routing entirely from the tool name.

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