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Agent.ai MCP Server

by OnStartups

file_converter_encrypt_action

Add password protection to a PDF file to restrict access. Provide the PDF URL and a password to generate an encrypted document.

Instructions

Password-protect a PDF file. Restricts who can open and read the document.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
input_file_urlYesS3 or public URL of the PDF to encrypt.
passwordYesPassword to set on the PDF.
output_variable_nameYesVariable name for the result.encrypted_pdf
Behavior2/5

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

No annotations are provided, so the description must fully disclose behavioral traits. It states the action (password-protect) but does not explain side effects (e.g., whether the original file is modified or a new copy created), auth requirements, or how the result is returned.

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?

The description is two concise sentences, front-loaded with the action verb, and contains no redundant or extraneous information.

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 covers the basic purpose but lacks details about the output format, constraints (e.g., file size limits), and how the result is stored (only implied by output_variable_name). For a simple mutation tool, more behavioral context would be helpful.

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 coverage is 100%, and the description adds no additional meaning beyond what the schema already provides for each parameter. It does not compensate with extra context.

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 uses a specific verb 'password-protect' and identifies the resource as a PDF file, clearly distinguishing it from sibling file_converter_ actions like convert, watermark, or merge.

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 does not provide explicit guidance on when to use this tool versus alternatives or when not to use it. Usage is implied by the tool's name and simple purpose.

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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