Skip to main content
Glama
Sign In
infra-mcp

infra-mcp

by esp4ce
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

get_log_file

Retrieve the last N lines of a log file from a VM, with optional grep filtering applied server-side before transmission.

Instructions

Returns the last N lines of a log file on a VM, with optional grep pattern. Both grep and line-capping execute on the VM before any data is transmitted.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "vm": "<vm>",
      "path": "<path>"
    },
    "name": "get_log_file"
  }
}

Input Schema

NameRequiredDescriptionDefault
vmYesVM name as defined in infra-mcp.yaml
pathYesAbsolute path to the log file; must be under a configured log_dirs entry
linesNoMaximum lines to return; server-capped at 200
patternNoExtended regex applied on the VM before transmission (grep -E)

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed4 schema fields changedv0.1.2
    • addedInput schema / properties / lines / description
      Added value: +"Maximum lines to return; server-capped at 200"
    • addedInput schema / properties / path / description
      Added value: +"Absolute path to the log file; must be under a configured log_dirs entry"
    • addedInput schema / properties / pattern / description
      Added value: +"Extended regex applied on the VM before transmission (grep -E)"
    • addedInput schema / properties / vm / description
      Added value: +"VM name as defined in infra-mcp.yaml"
  2. First observed

TDQS

A3.8/5.0
Behavior4/5

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

With no annotations provided, the description carries full burden and discloses a key behavioral trait: grep and line-capping execute on the VM before data transmission. However, it does not mention potential side effects, authorization needs, or error conditions.

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 effectively communicate purpose and key behavior with no wasted words. The structure is front-loaded with the primary action.

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?

The description covers the main functionality and a key behavioral detail. With an output schema present, the return values do not need explanation. However, it could mention prerequisites like VM availability or file existence.

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 100%, so baseline is 3. The description adds the behavioral note that processing occurs on the VM, but does not provide additional semantic meaning beyond the existing schema descriptions for each parameter.

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 tool returns the last N lines of a log file on a VM with optional grep pattern, specifying verb and resource. It distinguishes from siblings like get_service_logs by focusing on VM-level log files.

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 is provided on when to use this tool over alternatives such as get_service_logs or get_audit_log. The description lacks context for choosing this tool among sibling tools.

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

Deploy Server

Other Tools