This record as markdown: /tools/io-github-devopam-mcpg/read-pg-wal-records.md
What read_pg_wal_records does on Mcpg
AI agents call read_pg_wal_records to retrieve information from Mcpg without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why read_pg_wal_records is rated Low
WAL records contain database transaction history and recovery information. Reading them is a Read operation (no side effects), but WAL records are sensitive internal database logs that could expose transaction details, user activity, or data patterns. This justifies medium severity rather than low, as an agent with access could extract operational intelligence or commit sequences.
From the tool's definition Tool name 'read_pg_wal_records' indicates retrieval of PostgreSQL Write-Ahead Logs (WAL records). The 'read_' prefix and 'WAL records' suggest data retrieval without modification. However, description is empty, limiting certainty.
Attacks that exploit this kind of access
The rule that runs read_pg_wal_records safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Mcpg, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For read_pg_wal_records, this is the rule to start with:
read_pg_wal_records 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 Mcpg, apply this rule, and every read_pg_wal_records call is checked against it from then on.
Questions about read_pg_wal_records
read_pg_wal_records is a read tool on the Mcpg MCP server. It is categorised as a Read tool in the Mcpg MCP Server, which means it retrieves data without modifying state.
Register the Mcpg MCP server in PolicyLayer and add a rule for read_pg_wal_records: 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 Mcpg. Nothing to install.
read_pg_wal_records 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 read_pg_wal_records 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 read_pg_wal_records. 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.
read_pg_wal_records is provided by the Mcpg MCP server (pypi:mcpg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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