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

Annotations already declare readOnly, idempotent, closed-world and non-destructive, so the safety profile is covered. The description adds real value beyond them by disclosing the return shape ("self-contained short answer, check date and URL") and the curated/dated nature of the content, which tells the agent how to present results and how to judge freshness.

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?

One front-loaded sentence with the country and lookup intent first, then scope, then return value. Efficient, though the single sentence bundles purpose, scope and return contract into a fairly long clause chain.

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, the description correctly compensates by describing what comes back (short answer, check date, URL), and the sole parameter is fully specified. Annotations cover the safety profile; only sibling routing and any freshness/coverage limits are absent.

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?

Single parameter with 100% schema coverage, so the schema already documents that `query` is a question or keywords. The description adds only the topical scope of valid queries, which is marginally useful but no format or length guidance beyond the schema's own examples.

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?

Specific verb+resource: "Finds the Payotte guide" scoped to India and to a clearly enumerated topic set (buying, financing, selling, renting, owning, NRI/OCI rules). The leading "INDIA." tag plus the Payotte framing separates it from the many country-specific siblings (guide_au, guide_uk, house_prices_in, home_loan_emi_in) without needing to open a schema.

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 topic list and "answering a question" framing imply when this tool is appropriate, but there is no explicit routing: an agent getting "what is stamp duty in India" cannot tell from this text whether to use this guide or stamp_duty_in / home_loan_emi_in / house_prices_in. No exclusions or alternatives are named.

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