MCP, MCP server
Mcp Logic
An MCP server for automated first-order logic reasoning using Prover9, Mace4, and an onboard reasoning LLM.
Compatibility: Not stated.
Grade B
Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST SECRETS_PATH_UNCONFIRMED PERMISSION_SHELL_DECLARED INSTALL_DOCUMENTED_INSTALLER OBFUSCATION_FILE_OVER_READ_CAP
Why this grade
- NETWORK_NO_FIXED_HOST Low
Makes a network call whose host is not written as a fixed address.
docker-setup.sh, line 18
sudo apt-get install -y ca-certificates curl gnupg - NETWORK_UNNAMED_HOST Low
Calls a fixed host that the description does not name.
docker-setup.sh, line 18
sudo apt-get install -y ca-certificates curl gnupg - SECRETS_PATH_UNCONFIRMED Low
The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.
.gitignore, line 6
.Python - PERMISSION_SHELL_DECLARED Note
Runs shell commands, and the manifest or description says so.
.planning/PROJECT.md, line 45
- [ ] **RQ-01**: Replace blocking `subprocess.run()` in async tool handlers with `asyncio.create_subprocess_exec()` or thread executor to avoid blocking the event loop - INSTALL_DOCUMENTED_INSTALLER Note
Documentation shows an installer that pipes a download into a shell.
setup-advisor.sh, line 87
echo " curl -LsSf https://astral.sh/uv/install.sh | sh" - OBFUSCATION_FILE_OVER_READ_CAP Note
A file was over the read cap and was not fully read.
uv.lock, line 1
version = 1
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
Note
requests shell access. The manifest names this permission.
PERMISSION_SHELL_DECLARED
.planning/PROJECT.md, line 45
- [ ] **RQ-01**: Replace blocking `subprocess.run()` in async tool handlers with `asyncio.create_subprocess_exec()` or thread executor to avoid blocking the event loop
.planning/REQUIREMENTS.md, line 7
- [ ] **RQ-01**: Replace blocking `subprocess.run()` in async tool handlers (`server.py:handle_call_tool`) with `asyncio.create_subprocess_exec()` to avoid blocking the event loop
.planning/REQUIREMENTS.md, line 25
- [ ] **CLEAN-01**: Make Mace4 timeout configurable - accept optional `timeout: int` param in `find_model()` and `find_counterexample()`, threading it to both the `assign(max_secon
Show more
.planning/ROADMAP.md, line 73
4. `asyncio.create_subprocess_exec()` is used in place of `subprocess.run()` in all proof/model-finding paths
.planning/codebase/CONCERNS.md, line 14
The MCP tool handlers are `async def` but all subprocess calls (`prover9`, `mace4`) are synchronous `subprocess.run()`. This blocks the entire asyncio event loop during 60-second p
.planning/codebase/CONCERNS.md, line 18
result = subprocess.run([str(self.prover_exe), "-f", str(input_path)], ...)
.planning/codebase/CONCERNS.md, line 102
The `assign(max_seconds, 60).` directive and the `subprocess.run(..., timeout=60)` are both hardcoded at 60s. For large domain searches, this is very tight; for small domain search
.planning/codebase/CONVENTIONS.md, line 108
result = subprocess.run([...], capture_output=True, text=True, timeout=timeout, check=False)
Install and update
Note
The docs document an installer that pipes a download into a shell.
INSTALL_DOCUMENTED_INSTALLER
setup-advisor.sh, line 87
echo " curl -LsSf https://astral.sh/uv/install.sh | sh"
Network
Concern
can reach a host that is not written as a fixed address. can reach download.docker.com. The description does not name that host.
NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST
docker-setup.sh, line 18
sudo apt-get install -y ca-certificates curl gnupg
docker-setup.sh, line 24
curl -fsSL --output "${DOCKER_GPG_KEY}" https://download.docker.com/linux/ubuntu/gpg
linux-setup-script.sh, line 163
curl \\
Secrets
Concern
reads a credential or environment file.
SECRETS_PATH_UNCONFIRMED
.gitignore, line 6
.Python
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.
OBFUSCATION_FILE_OVER_READ_CAP
uv.lock, line 1
version = 1
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit b11999d12a18. requests shell access. The manifest names this permission. The docs document an installer that pipes a download into a shell. can reach a host that is not written as a fixed address. can reach download.docker.com. The description does not name that host. reads a credential or environment file. a file was over the read cap and was not fully read.
Date and source
Date checked:
github.com
Commit graded: b11999d12a18e145a9908a13c08db05d257a11a6
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