MCP Document Reader

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions the tool generates a presentation and describes the return value, but lacks critical details such as permissions required, file system impacts, error handling, or rate limits. For a write operation with zero annotation coverage, this is a significant gap in transparency.

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 appropriately sized and front-loaded, starting with the core functionality. Each sentence adds value, such as format details and parameter explanations, with no wasted text. The structure is clear, though it could be slightly more streamlined by integrating parameter details more cohesively.

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 the complexity of a presentation generation tool with 4 parameters, 0% schema coverage, and no annotations, the description is moderately complete. It covers the basic operation and parameters but lacks depth in behavioral aspects and usage context. The presence of an output schema helps by documenting the return value, but overall completeness is adequate with clear gaps.

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 0%, so the description must compensate. It adds meaning by explaining each parameter's purpose (e.g., 'Target output path ending with .pptx or .ppt' for filename, 'Optional title slide title' for title). However, it does not fully detail the structure of 'slides' (e.g., what 'slide definitions' entail) or provide examples, leaving some ambiguity. This partial compensation justifies a baseline score.

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 'Generates a PowerPoint presentation in PPTX format, or PPT via LibreOffice conversion,' which specifies the verb (generates) and resource (PowerPoint presentation). It distinguishes from siblings like write_word_document by specifying the output format, though it could be more explicit about the distinction. It's not tautological and provides a clear purpose.

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 no guidance on when to use this tool versus alternatives like write_word_document or other siblings. It mentions the output formats but does not specify scenarios, prerequisites, or exclusions for usage. This leaves the agent without contextual direction for tool selection.

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