Severity: HighStatus: OpenSQ-SERVER-AUTH-NONE-WRITE
State-changing tools available without authentication
The remote server lists state-changing tools without requiring authentication.
First seen · Last seen
Findings
Detected by Squatch rules from the server's metadata and protocol behavior. Latest completed scan: .
Severity: High4 findings
Suggested fix: Require MCP authorization for servers that expose state-changing tools.
Severity: HighStatus: OpenSQ-TOOL-TITLE-EFFECT-MISMATCH
Display title describes a lower-impact action than the name
The tool's display title describes a lower-impact action than its name (for example a read title on a delete tool).
First seen · Last seen
Suggested fix: Make the title describe the same action as the tool name.
Severity: HighStatus: OpenSQ-TOOL-TITLE-EFFECT-MISMATCH
Display title describes a lower-impact action than the name
The tool's display title describes a lower-impact action than its name (for example a read title on a delete tool).
First seen · Last seen
Suggested fix: Make the title describe the same action as the tool name.
Severity: HighStatus: OpenSQ-TOOL-TITLE-EFFECT-MISMATCH
Display title describes a lower-impact action than the name
The tool's display title describes a lower-impact action than its name (for example a read title on a delete tool).
First seen · Last seen
Suggested fix: Make the title describe the same action as the tool name.
Severity: Medium7 findings
Severity: MediumStatus: OpenSQ-TOOL-CROSS-TOOL-REFERENCE
Gives instructions about other tools
Model-facing text gives the AI model instructions about tools that this server does not provide (tool shadowing).
First seen · Last seen
Suggested fix: Describe only this server's own tools.
Severity: MediumStatus: OpenSQ-TOOL-CREDENTIAL-ARGUMENT
Asks the AI model to supply credentials as arguments
A tool parameter asks the AI model to supply a password, token, key or similar credential, which the model can see and repeat.
First seen · Last seen
Suggested fix: Obtain credentials through server-side configuration or MCP authorization instead of tool arguments.
Severity: MediumStatus: OpenSQ-TOOL-OVERLY-BROAD
Runs arbitrary code with open-world access
The tool runs code, commands or queries supplied at call time and does not declare a closed-world scope.
First seen · Last seen
Suggested fix: Narrow the tool to specific operations, or declare and enforce a closed-world sandbox.
Severity: MediumStatus: OpenSQ-TOOL-CROSS-TOOL-REFERENCE
Gives instructions about other tools
Model-facing text gives the AI model instructions about tools that this server does not provide (tool shadowing).
First seen · Last seen
Suggested fix: Describe only this server's own tools.
Severity: MediumStatus: OpenSQ-TOOL-OVERLY-BROAD
Runs arbitrary code with open-world access
The tool runs code, commands or queries supplied at call time and does not declare a closed-world scope.
First seen · Last seen
Suggested fix: Narrow the tool to specific operations, or declare and enforce a closed-world sandbox.
Severity: MediumStatus: OpenSQ-TOOL-CROSS-TOOL-REFERENCE
Gives instructions about other tools
Model-facing text gives the AI model instructions about tools that this server does not provide (tool shadowing).
First seen · Last seen
Suggested fix: Describe only this server's own tools.
Severity: MediumStatus: OpenSQ-TOOL-CONCEALMENT
Text asks the AI model to hide actions from the user
Model-facing text instructs the AI model to hide actions or information from the user.
First seen · Last seen
Suggested fix: Remove any wording that asks the model to act silently or withhold information from the user.
Severity: Low3 findings
Severity: LowStatus: OpenSQ-TOOL-INJECTION-INSTRUCTIONS
Instructions addressed to the AI model
Model-facing text contains instructions addressed to the AI model rather than a description of the tool (for example to override prior instructions, to act before using tools, or to react to trigger phrases).
First seen · Last seen
Suggested fix: Describe what the tool does and its parameters. Do not include instructions to the model about other tools, the user or the conversation.
Severity: LowStatus: OpenSQ-TOOL-META-INSUFFICIENT
Description too thin to determine behavior
The tool's name and description do not state what it does.
First seen · Last seen
Suggested fix: Describe the action the tool performs, its target and its side effects.
Severity: LowStatus: OpenSQ-REPO-MISSING
No source repository linked
No source repository is linked in the registry entry.
First seen · Last seen
Suggested fix: Add a repository to server.json.
What this scan does not cover
- Squatch never calls a server's tools, so it cannot see what they actually do at run time.
- It scans without credentials: tools behind authentication may not be visible.
- It does not review source code, dependencies or the publisher's infrastructure.
- A server can change behavior between scans; monitoring compares each scan with the last.
- Classifications come from tool names, descriptions and schemas, which the publisher controls.