MCP, MCP server
action_mcp
ActionMCP is a Ruby gem focused on providing Model Context Protocol (MCP) capability to Ruby on Rails applications, specifically as a server.
Compatibility: Not stated.
Grade C
One Medium finding. Read the findings before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
Rescanned at commit 76b30644b327.
NETWORK_HOST_FROM_INPUT
Why this grade
- NETWORK_HOST_FROM_INPUT Medium
A file takes a URL or endpoint as input and has no fixed host list.
lib/action_mcp/prompt.rb, line 200
@response.add_content(content, role: args.fetch(:role, "user")) # Add to the response
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Pass
No shell or command execution found, and no extra permission was declared.
Install and update
Pass
No install-time script found, and dependencies are pinned or absent.
Network
Serious
accepts a host from input, with no fixed list in this file. can reach a host that is not written as a fixed address.
NETWORK_HOST_FROM_INPUT NETWORK_NO_FIXED_HOST
lib/action_mcp/prompt.rb, line 200
@response.add_content(content, role: args.fetch(:role, "user")) # Add to the response
lib/action_mcp/protocol_validator.rb, line 449
REQUEST_PARAM_SCHEMERS.fetch("initialize").valid?(normalize(params))
lib/action_mcp/tool.rb, line 318
properties[alias_name] = _schema_properties.fetch(property_name).deep_dup
Show more
lib/action_mcp/apps/view_manifest.rb, line 36
classes = data.fetch("views", {}).map do |name, entry|
lib/action_mcp/apps/view_manifest.rb, line 55
(@resource_uri_aliases || {}).fetch(uri, uri)
lib/action_mcp/apps/view_manifest.rb, line 111
bundle_path = File.join(dir, entry.fetch("file"))
lib/action_mcp/apps/view_manifest.rb, line 117
uri = entry.fetch("uri")
lib/action_mcp/apps/view_manifest.rb, line 118
logical_uri = entry.fetch("logicalUri", "ui://views/#{name}")
Secrets
Concern
reads a credential or environment file.
SECRETS_PATH_UNCONFIRMED
.gitignore, line 21
coverage/
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Note
a file was over the read cap and was not fully read. the file cap was reached before every file was read.
OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED
lib/action_mcp/apps/javascript/ext_apps.js, line 1
var fI=Object.defineProperty;var dI=(r)=>r;function hI(r,i){this[r]=dI.bind(null,i)}var Lr=(r,i)=>{for(var v in i)fI(r,v,{get:i[v],enumerable:!0,configurable:!0,set:hI.bind(i,v)})}
test/dummy/db/migrate/20260528084200_consolidated_migration.action_mcp.rb, line 1
# frozen_string_literal: true
Licence
Note
no licence file found.
LICENCE_MISSING
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit 76b30644b327. accepts a host from input, with no fixed list in this file. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read. the file cap was reached before every file was read. no licence file found.
Date and source
Date checked:
github.com
Commit graded: 76b30644b32758e6e1c1a53dc26b4653435e3d6c
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