PostgreSQL_logical_replication_slot_lag
List logical replication slots with current lag in bytes and status.
This record as markdown: /tools/mukul975-postgres-mcp-server/postgresql-logical-replication-slot-lag.md
What PostgreSQL_logical_replication_slot_lag does on Postgres
AI agents call PostgreSQL_logical_replication_slot_lag to retrieve information from Postgres without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why PostgreSQL_logical_replication_slot_lag is rated Low
This tool queries replication slot metadata and lag metrics. It retrieves information about the state of logical replication slots but does not create, modify, delete, or execute operations. The action is purely informational/diagnostic, consistent with monitoring and observability use cases. No side effects, no data changes, no code execution.
From the tool's definition Tool name and description indicate 'List logical replication slots with current lag in bytes and status' — a read-only query operation that retrieves monitoring data without modification or execution of arbitrary code.
Attacks that exploit this kind of access
The rule that runs PostgreSQL_logical_replication_slot_lag safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Postgres, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For PostgreSQL_logical_replication_slot_lag, this is the rule to start with:
PostgreSQL_logical_replication_slot_lag is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Postgres, apply this rule, and every PostgreSQL_logical_replication_slot_lag call is checked against it from then on.
Questions about PostgreSQL_logical_replication_slot_lag
List logical replication slots with current lag in bytes and status. It is categorised as a Read tool in the Postgres MCP Server, which means it retrieves data without modifying state.
Register the Postgres MCP server in PolicyLayer and add a rule for PostgreSQL_logical_replication_slot_lag: 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 Postgres. Nothing to install.
PostgreSQL_logical_replication_slot_lag 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 PostgreSQL_logical_replication_slot_lag 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 PostgreSQL_logical_replication_slot_lag. 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.
PostgreSQL_logical_replication_slot_lag is provided by the Postgres MCP server (mukul975/postgres-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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