# cancel_query A execute tool on the Mcpg MCP server. Agent View of the PolicyLayer registry record for `cancel_query`. HTML page: https://policylayer.com/tools/io-github-devopam-mcpg/cancel-query ## Facts - Tool: `cancel_query` - Server: Mcpg (`pypi:mcpg`) — https://policylayer.com/tools/io-github-devopam-mcpg.md - Install: `npx -y pypi:mcpg` - Homepage: https://github.com/devopam/MCPg - Risk category: Execute (High risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Rate-limited ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "cancel_query", "arguments": {} } } ``` ## Why cancel_query is rated High Cancelling a running query is an active operation that terminates an executing database process. It has side effects (interrupting ongoing operations) but is generally reversible (the query can be re-run), placing it in Execute. Severity is high because an AI agent misusing this could disrupt production database operations. Confidence is reduced due to the empty description. From the tool's own definition: "Tool name 'cancel_query' — description is empty and uninformative, so relying on name alone." ## Use case AI agents invoke cancel_query to trigger actions in Mcpg. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Mcpg: ```json { "version": "1", "default": "deny", "tools": { "cancel_query": { "limits": [ { "counter": "cancel_query_rate", "window": "minute", "max": 10, "scope": "grant" } ] } } } ``` ## Other tools on Mcpg (251) - `cancel_migration` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/cancel-migration.md - `drop_graph` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/drop-graph.md - `drop_property_graph` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/drop-property-graph.md - `drop_publication` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/drop-publication.md - `drop_subscription` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/drop-subscription.md - `dump_database` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/dump-database.md - `partman_drop_partition` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/partman-drop-partition.md - `prune_audit_events` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/prune-audit-events.md - `restore_database` — Destructive — https://policylayer.com/tools/io-github-devopam-mcpg/restore-database.md - `cluster_vectors` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/cluster-vectors.md - `complete_migration` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/complete-migration.md - `dry_run_ddl` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/dry-run-ddl.md - `enable_extension` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/enable-extension.md - `enable_logical_replication_on_demand` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/enable-logical-replication-on-demand.md - `enable_redis_fdw` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/enable-redis-fdw.md - `generate_graph_projection` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/generate-graph-projection.md - `generate_test_data` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/generate-test-data.md - `hybrid_search` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/hybrid-search.md - `maintain_turboquant_index` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/maintain-turboquant-index.md - `mmr_search` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/mmr-search.md - `open_cursor` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/open-cursor.md - `optimize_query` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/optimize-query.md - `partman_run_maintenance` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/partman-run-maintenance.md - `pg_search_run` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/pg-search-run.md - `prepare_migration` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/prepare-migration.md - `prewarm_recommended` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/prewarm-recommended.md - `prewarm_relation` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/prewarm-relation.md - `recommend_redistribute` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/recommend-redistribute.md - `reindex_pg_search_index` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/reindex-pg-search-index.md - `reindex_turboquant_index` — Execute — https://policylayer.com/tools/io-github-devopam-mcpg/reindex-turboquant-index.md - …and 221 more: https://policylayer.com/tools/io-github-devopam-mcpg.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-devopam-mcpg · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-devopam-mcpg