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

Annotations cover safety (readOnlyHint) but openWorldHint=true could mislead an agent into expecting live/fresh data; the description usefully corrects this by scoping to a fixed 'observed' catalogue. It also discloses return shape (exact/equivalent matches plus dated offers in AED), adding real value 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?

Three short sentences, front-loaded with what is searched, then what is returned, then the key exclusion. No filler.

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?

An output schema exists, so return values needn't be explained in depth, and the description already summarizes them. Scope, query semantics, and the live-search caveat give an agent everything needed to invoke this single-parameter read tool correctly.

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 0% and the schema only constrains the query as a 1-120 char string, so the description carries the burden and does compensate by enumerating accepted query kinds (name, brand, identifier). It stops short of format details (e.g., how to pass an identifier).

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?

States a specific verb (Search) and resource (observed Dubai grocery catalogue) with explicit matching fields (name, brand, identifier). The closing sentence distinguishes it from the live-web sibling find_price_online without needing the 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?

Gives clear context ('observed catalogue', 'does not run a live web search') which effectively rules out a when-not case, but never names find_price_online as the alternative for live lookups nor states prerequisites. Good routing signal, though not fully explicit.

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