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cygnussystems

cygnus-ssh-mcp

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ssh_file_get_context_around_line

Retrieve lines before and after an exact line match in a remote file via SSH, with configurable context size.

Instructions

Get lines before and after a line that matches exactly.

Returns: Dictionary with match line number and context block

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
file_pathYesPath to the file
match_lineYesExact line content to match
contextNoNumber of lines before and after to include
use_sudoNoUse sudo for the operation

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

No annotations provided, so the description should carry the burden of disclosing side effects. It only states the return type but omits that the tool reads a remote file without modification, or any permission or error details.

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?

Extremely concise: two sentences capture the action and return type with no waste. Structure is clear and front-loaded.

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

Completeness4/5

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

With complete schema descriptions and an output schema, the description is adequate. It adds return value specifics, though it lacks error conditions and permission details.

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 descriptions cover all 4 parameters (100% coverage). The tool description does not add extra meaning beyond the schema, so baseline score is appropriate.

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

Purpose4/5

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

The description clearly states it gets lines before and after an exact line match. It distinguishes from pattern-matching tools like ssh_file_find_lines_with_pattern by specifying 'exactly', but does not explicitly name the sibling.

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

Usage Guidelines2/5

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

No guidance on when to use this tool versus alternatives. It does not mention when not to use it or provide context about prerequisites.

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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