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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so the safety profile is covered. The description adds behavioral value by enumerating what is returned (title, company, location, salary, employment type, description, benefits) and noting it works on a single posting. No rate-limit or auth detail, but nothing contradicts the 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?

Front-loaded with the core action, followed by return payload and use cases. Every sentence earns its place, though the use-case list is slightly long and not all items are equally informative.

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 no output schema and only one required parameter, the description carries the return-value burden itself and does so by enumerating returned fields. Nothing an agent needs in order to call this correctly 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% for the single parameter, giving a baseline of 3. The description goes beyond the generic schema text ('URL of the job vacancy') by specifying it must be a 'viewjob URL', which constrains the expected input format meaningfully.

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+resource ('Fetches a single Indeed job posting by its viewjob URL') and explicitly distinguishes itself from the sibling listing endpoint. An agent can tell it apart from hasdata_indeed_listing_getJobListings and hasdata_glassdoor_job_getJobDetails without opening any 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?

Gives concrete usage contexts (ATS/CRM enrichment, compensation benchmarking, resume-to-JD matching, archival) and names the Listing endpoint as the discovery counterpart. It doesn't state exclusions or prerequisites, but the context is clear enough to select the tool correctly.

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