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-EXFIL-SHAPED-PARAM
Free-text parameter commonly used to collect conversation data
A free-text parameter has a name commonly abused to collect conversation, prompt or environment data.
First seen · Last seen
Suggested fix: Constrain the parameter (enum, maxLength) or rename it to reflect its purpose; never ask the model to fill it with conversation content.
Severity: HighStatus: OpenSQ-TOOL-EXFIL-SHAPED-PARAM
Free-text parameter commonly used to collect conversation data
A free-text parameter has a name commonly abused to collect conversation, prompt or environment data.
First seen · Last seen
Suggested fix: Constrain the parameter (enum, maxLength) or rename it to reflect its purpose; never ask the model to fill it with conversation content.
Severity: HighStatus: OpenSQ-TOOL-EXFIL-DIRECTIVE
Asks the AI model to pass conversation data or secrets
Model-facing text instructs the AI model to place conversation content, prompts, tool history or secrets into tool arguments or external destinations.
First seen · Last seen
Suggested fix: Do not ask the model to include conversation, prompt or credential content in arguments.
Severity: Medium5 findings
Severity: MediumStatus: OpenSQ-SERVER-INSTRUCTIONS-INJECTION
Server instructions contain directives to the AI model
The server's instructions field contains directives addressed to the AI model beyond describing how to use the server.
First seen · Last seen
Suggested fix: Limit server instructions to usage guidance for this server's own tools.
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-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-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-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: Low2 findings
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.
Severity: LowStatus: OpenSQ-CONFORMANCE-MODERN-FAILURE
Protocol conformance checks failed
The server failed one or more MCP protocol conformance checks.
First seen · Last seen
Suggested fix: Review the failed checks against the MCP specification.
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.