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

Goes well beyond the readOnly/openWorld annotations: it discloses the underlying public JSON route, the exact result fields (including that salary is only present 'when the employer shows it'), the match count, and the metered payment model ($0.002 USDC per successful call via x402, failures free). Pricing and failure-billing behavior are exactly the kind of context annotations cannot carry.

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?

Front-loaded with the source and result scope, followed by a compact billing sentence. It is dense and slightly long in the first sentence, but each clause (source, region, fields, price, failure policy) carries information an agent needs.

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?

An output schema exists, yet the description still summarizes returns usefully; source, region, pricing and failure policy are all covered. Minor gaps remain around result freshness and pagination limits relative to the start cap, but nothing blocking 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 description coverage is 100%, so the schema already documents query, location, limit and start. The description only restates keywords and 'optional city' without adding format or constraint detail, so it earns the baseline rather than more.

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 ('job ads on foundit.in') plus the scope (keywords + optional city) and even the origin ('formerly Monster India'), which distinguishes it cleanly from the many other job-board siblings. An agent can identify the site and result shape without opening the schema.

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?

The India/foundit framing implies when this tool is appropriate versus, say, jobs_naukri_com or jobs_indeed, but no alternative is named and there are no explicit exclusions or preconditions (e.g., indexing lag, coverage limits). Usage is inferable but not instructed.

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