List all schemas in the Redshift database.
AI agents call list_schemas to retrieve information from Combined MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries database metadata to enumerate available schemas. It is a read-only operation that retrieves information about database structure without modifying, executing, or deleting anything. The blast radius of misuse is minimal—an agent could discover schema names but cannot access actual data or cause harm.
From the tool's definition Tool name is 'list_schemas' and description states it 'List[s] all schemas in the Redshift database' — a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all schemas in the Redshift database. It is categorised as a Read tool in the Combined MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Combined MCP Server MCP server in PolicyLayer and add a rule for list_schemas: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Combined MCP Server. Nothing to install.
list_schemas is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_schemas rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list_schemas. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list_schemas is provided by the Combined MCP Server MCP server (manish6007/mcp_servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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