PostgreSQL_diagnose_logical_replication_lag
Diagnose logical replication lag and identify bottlenecks.
This record as markdown: /tools/mukul975-postgres-mcp-server/postgresql-diagnose-logical-replication-lag.md
What PostgreSQL_diagnose_logical_replication_lag does on Postgres
AI agents call PostgreSQL_diagnose_logical_replication_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_diagnose_logical_replication_lag is rated Low
This is a diagnostic tool that queries replication lag metrics and identifies performance issues. It retrieves and analyzes PostgreSQL internal state without modifying data, executing arbitrary code, or triggering destructive operations. The action is observational/analytical in nature, making it a Read operation with low severity impact.
From the tool's definition Tool name contains 'diagnose' and description states 'Diagnose logical replication lag and identify bottlenecks' - both indicate data retrieval and analysis with no modification or execution of external operations.
Attacks that exploit this kind of access
The rule that runs PostgreSQL_diagnose_logical_replication_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_diagnose_logical_replication_lag, this is the rule to start with:
PostgreSQL_diagnose_logical_replication_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_diagnose_logical_replication_lag call is checked against it from then on.
Questions about PostgreSQL_diagnose_logical_replication_lag
Diagnose logical replication lag and identify bottlenecks. 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_diagnose_logical_replication_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_diagnose_logical_replication_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_diagnose_logical_replication_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_diagnose_logical_replication_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_diagnose_logical_replication_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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