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

Goes well beyond the readOnlyHint/openWorldHint annotations: discloses the residential-proxy data path, the ~30-jobs-per-page cap, and a precise cost/auth model ($0.01 USDC via x402 on Base/Solana/Arc, failed calls free). Cost and billing semantics are exactly the kind of context an agent cannot infer from structured fields.

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-loads purpose and region, then fields, then cost/billing in a logical order with no filler. It is a single dense run-on sentence whose long field enumeration could be trimmed, but every clause carries information.

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 signals the payload shape, and it covers the two things an agent most needs and cannot infer: the per-page ceiling and the paid-call billing mechanism. Nothing material is missing for correct invocation.

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 mirrors the description's mention of query, country, optional city and page. The description adds little parameter-level detail beyond phrasing like 'up to ~30 jobs per page', which the schema's page range (1-10) already governs, 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?

States a specific source (Bayt.com), a region (MENA), the query shape (keyword in a country, optionally a city), and enumerates the returned fields. This clearly separates it from the many generic job-board siblings such as jobs_indeed or jobs_linkedin_jobs without needing to open 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 MENA scope plus 'for a keyword in a country (optionally a city)' gives an agent clear context for when this tool fits versus global boards. However, it never explicitly names an alternative or states when NOT to use it, so it stops short of full routing guidance.

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