AI FileSystem MCP

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

No annotations are provided, so the description carries full burden. It states the action ('decrypt') but doesn't disclose behavioral traits such as what happens if the password is wrong, whether the original file is preserved, performance characteristics, or error handling. This is a significant gap for a security-related tool.

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 a single, efficient sentence with zero waste—it directly states the tool's purpose without unnecessary words. It's appropriately sized and front-loaded for quick understanding.

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 decryption operation with no annotations and no output schema, the description is incomplete. It lacks details on success/failure behavior, output format (e.g., file location or content), and security implications, which are crucial for an AI agent to use this tool correctly.

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 (path, password, outputPath). The description adds no additional meaning beyond what's in the schema, such as password format requirements or output path defaults. Baseline 3 is appropriate when schema does the heavy lifting.

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 specific action ('decrypt') and resource ('an encrypted file') with the method ('with a password'), distinguishing it from sibling tools like 'encrypt_file' (which performs the inverse operation) and 'read_file' (which doesn't involve decryption).

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 implies usage when you have an encrypted file and know the password, but doesn't explicitly state when to use this vs. alternatives like 'encrypt_file' (for encryption) or 'read_file' (for reading unencrypted files). No guidance on prerequisites or exclusions is provided.

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