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

No annotations are supplied, so the description carries the burden; "Get" and the mention of current price/availability make the read-only, single-record nature clear. It omits error behavior for unknown ids, whether prices include currency/VAT, and any auth or rate-limit constraints, which matter for a live-pricing lookup.

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 sentence, front-loaded with the resource and returned fields, with the id provenance in parentheses. Nothing is redundant or padded.

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 tool with no output schema, the description names the salient return fields (price, availability, description), which is the key thing an agent needs. Minor gaps remain around failure modes and currency/format details, but nothing essential for correct invocation is missing.

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 100% for the single required parameter, so the baseline is 3. The description adds value by giving provenance (derived from search_products) and an inline example id format, which helps the agent supply a valid value.

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 (Get) and resource (one 2read.gr product) plus the exact fields returned (price, availability, full description). The word "one" and the product_id keying clearly separate it from search_products, which returns multiple results.

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?

Explicitly tells the agent where the identifier comes from ("from search_products"), establishing the search-then-fetch workflow. It does not state any when-not-to-use case or what happens with an invalid/stale id, so it stops short of full routing guidance.

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