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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety and determinism profile is fully covered without the description. The description's only added behavior detail is the return content (Gurmukhi + transliteration + English), with no mention of output size, pagination, or handling of out-of-range Ang values.

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 output format is front-loaded, but the second sentence is a boilerplate catalogue of unrelated app capabilities that earns no place in a single-parameter page-fetch tool. Half the description is effectively off-topic padding.

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 one-parameter, read-only tool with no output schema, the definition is minimally viable: it conveys that a full page of lines is returned with three text forms. It omits anything about response size or ordering, but with the schema and annotations covering the rest, the gap is modest.

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 'ang' parameter is documented with its 1–1430 range and meaning (page of Sri Guru Granth Sahib) directly in the schema. The description adds no syntax, unit, or edge-case detail beyond that, so the baseline 3 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 first sentence states the resource and content ('every line on an Ang ... Gurmukhi with transliteration and English'), but it is a verbatim restatement of the title rather than a specific verb+resource statement. The second sentence is an app-level feature list ('daily shabad, plans, search, Ang and shabad lookup; whole books') that describes the whole Gurbani suite, not this tool, so it dilutes 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?

No guidance on when to call this versus siblings such as get_shabad, get_reading, or read_book. The phrase 'Ang and shabad lookup' gestures at a lookup family but does not say which lookup applies when, leaving the agent to infer selection from names alone.

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