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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered structurally. Beyond that, the description adds genuinely useful behavioral context by disclosing the return shape (products list with fields, FAQ pairs with answers) — valuable since no output schema exists. It does not say how an unknown or malformed slug is handled, which keeps it from a 5.

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 dense sentence that front-loads the action ('Return one MamaChoice guide in full') and then the payload details. No filler, no restatement of the title, and the guidance pointer to search_guides is appropriately placed last.

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 carries the burden of describing what comes back — products with pricing, links and delivery scope, plus FAQ answers — and the tiered annotations cover the safety profile. The only real gap is error/empty behavior for an unresolved slug, a minor omission for such a simple one-parameter read tool.

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 parameter's schema already states it accepts a slug (with an example) or a full URL. The description restates 'slug or URL' without adding format, normalization, or fallback semantics beyond the schema, 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?

Specific verb (Return) plus a precisely scoped resource (one MamaChoice guide in full) and an enumeration of its contents: products with name, ₪ price, AliExpress link, and FAQs with answers. This is clearly distinguishable from the sibling search_guides, which searches rather than retrieves a single guide.

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 routes the agent to the source of the identifier: 'Use the slug or URL from search_guides,' which establishes the search-then-fetch workflow and implicitly names the alternative. It stops short of stating when not to use this tool (e.g., when browsing many guides at once), so it is clear context rather than full when/when-not guidance.

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