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

Annotations already declare readOnly and idempotent, and the description adds behavioral context: return fields vary by caller identity (trust score/APC require identified caller), and supports filters. This goes beyond annotations without contradiction.

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?

Two concise sentences with front-loaded purpose; no redundant details beyond adding behavioral nuance.

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?

Given 4 parameters and no output schema, the description adequately describes what results contain (indexing status, quartile, OA info, trust score/APC) and the caller identity requirement. It does not enumerate all filter options, but the schema handles that.

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 covers all 4 parameters with descriptions, so baseline is 3. The description adds meaning by specifying query can be title, ISSN, or publisher, and mentions 'Supports filters' which aligns with the optional parameters, increasing value.

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?

The description uses a specific verb ('Search') and resource ('academic journals'), specifies search fields (title, ISSN, publisher), and distinguishes from sibling tools like get_journal and compare_journals by emphasizing broad search and returned metadata.

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 description states the tool's search capability and result scope, implying use for journal discovery by query. However, it does not explicitly compare with sibling tools like check_citations or get_journal, nor provide exclusions for when alternatives should be used.

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