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Forensics Utils MCP Server

Forensics Utils MCP Server

by jus1-c
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

firefox_parse_downloads_tool

Parse Firefox download history from a browser profile directory for forensic analysis. Filter by source or download URL and limit results.

Instructions

Parse Firefox download candidates from a browser profile.

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": {
      "profile_path": "<profile_path>"
    },
    "name": "firefox_parse_downloads_tool"
  }
}

Input Schema

NameRequiredDescriptionDefault
limitNoMaximum number of download records to return
source_urlNoOptional exact referring/source URL filter
download_urlNoOptional exact downloaded file URL filter
profile_pathYesAbsolute path to the Firefox profile directory

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

B3.2/5.0
Behavior2/5

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

With no annotations provided, the description carries the full responsibility for behavioral disclosure. It only states 'Parse,' which implies reading and extraction, but does not mention whether the tool modifies the profile, requires exclusive access, or has any side effects. This minimal disclosure leaves key behavioral traits undisclosed.

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 a single sentence that immediately states the action and target without filler. It is efficiently structured and easy to process, with no redundant or extraneous content.

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

Completeness2/5

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

Despite the existence of an output schema and complete parameter descriptions, the tool description lacks context about what constitutes a 'download candidate' or how parsing works. It also does not mention typical use cases, prerequisites like profile accessibility, or whether the profile should be closed. The brief description leaves significant gaps for a specialized 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?

All four parameters have descriptions in the input schema, covering 100% of the schema. The description adds no parameter-specific semantics beyond what the schema already provides. This meets the baseline expectation for schema-heavy documentation.

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 identifies the tool as parsing Firefox download candidates from a browser profile, which is a specific verb+resource combination. It distinguishes from sibling tools like firefox_parse_history_tool or chromium_parse_downloads_tool by explicitly targeting downloads. The term 'candidates' adds specificity without confusion.

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?

The description provides no guidance on when to use this tool versus alternative Firefox or Chromium parsing tools. There are no explicit or implicit conditions for selection, no prerequisites, and no mention of alternatives. Users are left without context to decide if this tool is appropriate.

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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