Jina AI Remote MCP Server

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

With no annotations provided, the description carries full burden. It discloses the parallel execution behavior and mentions 'optimal performance' with max 5 searches, but doesn't cover error handling, rate limits, authentication needs, or what happens if searches fail. It adds some context but leaves significant behavioral aspects unspecified.

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?

The description is perfectly concise with three sentences that each earn their place: states purpose, provides usage guidance, and suggests query generation alternatives. It's front-loaded with the core functionality and wastes no words.

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 no annotations and no output schema, the description should do more to explain behavioral aspects like error handling, result format, or performance characteristics. While it covers purpose and usage well, it lacks completeness for a parallel execution tool with complex parameters and no structured output documentation.

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 all parameters thoroughly. The description adds minimal value beyond the schema - it mentions providing 'multiple search queries' which aligns with the 'searches' array parameter, but doesn't explain parameter interactions or provide additional semantic context.

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 clearly states the tool's purpose with specific verbs ('run multiple web searches in parallel') and resource ('web searches'), distinguishing it from siblings like 'search_web' (singular) and 'parallel_search_arxiv' (different domain). It explicitly mentions 'comprehensive topic coverage and diverse perspectives' as the goal.

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 provides explicit guidance on when to use this tool: for 'comprehensive topic coverage and diverse perspectives' by running 'multiple search queries that explore different aspects of your topic.' It also names an alternative tool ('expand_query') for generating queries and distinguishes from single-search siblings.

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