Payload Validator

com.gumballtools/payload-validator

by com.gumballtools· v0.1.0Official MCP Registry

Findings

Detected by Squatch rules from the server's metadata and protocol behavior. Latest completed scan: Nov 14, 2026, 06:22 UTC.

HighOpenSQ-TOOL-CONCEALMENT

Model-facing text instructs the AI model to hide actions or information from the user.

First seen Oct 15, 2026 · Last seen Nov 14, 2026

Suggested fix: Remove any wording that asks the model to act silently or withhold information from the user.

HighOpenSQ-TOOL-CONCEALMENT

Model-facing text instructs the AI model to hide actions or information from the user.

First seen Oct 15, 2026 · Last seen Nov 14, 2026

Suggested fix: Remove any wording that asks the model to act silently or withhold information from the user.

HighOpenSQ-TOOL-CONCEALMENT

Model-facing text instructs the AI model to hide actions or information from the user.

First seen Oct 15, 2026 · Last seen Nov 14, 2026

Suggested fix: Remove any wording that asks the model to act silently or withhold information from the user.

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.

High-severity findings detected

3 open findings at HIGH or above (0 critical).

1 piece of evidence

Source: Squatch observedscan
Metadata and configuration analysis; tools are not executed.
Observed Nov 14, 2026, 06:22 UTC

Last checked Nov 14, 2026, 06:22 UTC

Squatch observed

Summary: { "type": "none", "challengeStatus": null, "scopesSupported": [], "resourceMetadataUrl": null, "authorizationServers": [] }

Checks: { "checks": [ { "check": "tools_list_deterministic", "passed": true }, { "check": "list_methods_succeed", "passed": true }, { "check": "list_results_schema_valid", "passed": true }, { "check": "pagination_terminates", "passed": true }, { "check": "tool_names_valid", "passed": true }, { "check": "tool_names_unique", "passed": true }, { "check": "no_network_schema_refs", "passed": true }, { "check": "x_mcp_header_valid", "passed": true }, { "check": "icon_urls_https_or_data", "detail": "no icons declared", "passed": true }, { "check": "discover_present", "passed": true }, { "check": "result_type_present", "passed": true }, { "check": "cacheable_fields_present", "passed": true }, { "check": "server_info_in_meta", "passed": true }, { "check": "no_session_id", "passed": true }, { "check": "unknown_method_404", "passed": true }, { "check": "notification_202", "passed": true }, { "check": "get_405", "passed": true } ], "toolsListNondeterministic": false }