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

Annotations already declare readOnly/idempotent/non-destructive, so safety is covered. The description adds value beyond that: it specifies that the response is the *full* page content and imposes an output convention (always cite the page url). With no output schema, this disclosure of return shape is genuinely useful.

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?

Two sentences, front-loaded with the action, then the usage condition and output rule. The slug enumeration is long but earns its place as a usage constraint; nothing is 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?

For a single-parameter read tool with no output schema, the description covers what is returned (full page content), the domain of valid inputs, and the required output convention. Only the absence of explicit sibling routing keeps it from a 5.

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%, so the baseline is 3, but the description goes further by enumerating the valid slug universe (the static pages plus services/<slug> for all 12 services), which effectively acts as an enum hint not present in the schema.

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 (อ่านเนื้อหาเต็ม = read full content) and resource (one CODENIVERSE web page), and enumerates the exact page set (about, contact, faq, terms, privacy, services/<slug>, all 12 services). An agent can distinguish this from get_article or get_company_profile purely from the description.

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?

Offers a usage condition ("use when you need service details or company info beyond what other tools provide"), which implies a boundary with siblings, but never names which sibling to prefer for which case (get_company_profile, get_article, list_services). The routing guidance is real but left to inference.

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