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Agent.ai MCP Server

by OnStartups

file_converter_optimize_action

Compress PDF, PNG, or JPG files to reduce file size while maintaining quality. Specify a profile for web, print, archive, or max optimization.

Instructions

Compress and optimize PDF, PNG, or JPG files without changing the format. Reduces file size while maintaining quality.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
input_file_urlYesS3 or public URL of the file to optimize.
input_formatYesFile extension (pdf, png, or jpg).pdf
profileNoweb
output_variable_nameYesVariable name for the result.optimized_file
Behavior3/5

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

With no annotations provided, the description bears full burden. It states the tool reduces file size while maintaining quality, but does not specify whether compression is lossy or lossless, nor disclose any limitations or side effects. The core behavior is clear, but additional detail could improve transparency.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, front-loaded with action, no redundant information. Every word serves a purpose. Highly efficient.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The description explains what the tool does but does not address output format, error scenarios, or return value semantics. Given the absence of an output schema and annotations, more detail would be helpful for an agent to fully utilize the tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 75% (3 of 4 parameters documented). The missing 'profile' parameter has enum but no description. The tool description adds no additional meaning to parameters beyond the schema. Baseline 3 is appropriate given coverage level.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb (compress/optimize), the resource (PDF, PNG, JPG files), and the scope (without changing format). It effectively distinguishes the tool from siblings like file_converter_convert_action (which changes format) and file_converter_encrypt_action.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description implies the tool is for compression needs where format must be preserved, but it does not explicitly state when to use this versus alternatives like convert or merge. No exclusions or prerequisites are mentioned.

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

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