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

Annotations already cover readOnly/destructive/openWorld, so no credit for 'Read-only'. The description adds genuinely new behavioral context: a data-handling restriction ('Do not send client data') and a refusal policy (personal-status topics). No contradiction with 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 returned, then constraints. 'Read-only' is mildly redundant with readOnlyHint=true, but nothing is padded or buried.

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?

There is no output schema, so the description must carry the return contract; it says the page states a law name and article number but not the return format (raw HTML? extracted text? blocks?) or failure behavior for URLs that don't. Adequate for a single-URL fetch, but a gap remains.

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 'url' parameter, so the schema already documents the domain and type. The description adds a constraint on the target page's content (must state a law name and article number) but no format, canonicalization, or error semantics beyond that.

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 and resource: returns ONE published al-taswia.com page that contains a law name and article number. This distinguishes it from the plural/list siblings search_articles and list_official_sources implicitly (single fetch vs. search/list), though neither sibling is named.

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 real exclusions — 'Do not send client data' and 'Personal-status topics are refused' — which tell the agent when it must not call the tool. It does not, however, point to an alternative tool (e.g. search_articles) for the refused cases, so routing guidance is incomplete.

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