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

Goes beyond the readOnlyHint/openWorldHint annotations by disclosing that ETPrime subscription-gated stories return a permission error rather than a truncated body, which is important failure-mode context. It does not detail rate limits or auth requirements, keeping it short of 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?

Three tight sentences, front-loaded with the action and resource before the gating caveat and the alternative-tool routing. Every sentence carries distinct value with 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?

With an output schema handling return values and annotations covering the read/open-world profile, the description supplies the two things an agent most needs: the gating failure mode and fallback tools. Nothing critical 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%, so the schema already documents the single url parameter. The description's 'canonical url' phrasing reinforces this but adds no real syntax or format detail beyond the structured field.

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 ('Fetch') and resource ('Economic Times article metadata and body paragraphs') and scopes it to a canonical url. It clearly distinguishes itself from the sibling list tools (headlines/sections) that only surface coverage rather than full article content.

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 names economictimes_headlines and economictimes_sections as alternatives for finding accessible coverage, giving the agent a clear routing signal. It omits an explicit negative case (e.g., when not to fetch directly), but the context is strong enough to guide selection.

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