# list_namespaces A read tool on the Kestra Python MCP Server MCP server. Agent View of the PolicyLayer registry record for `list_namespaces`. HTML page: https://policylayer.com/tools/kestra-io-mcp-server-python/list-namespaces ## Facts - Tool: `list_namespaces` - Server: Kestra Python MCP Server (`kestra-io/mcp-server-python`) — https://policylayer.com/tools/kestra-io-mcp-server-python.md - Homepage: https://github.com/kestra-io/mcp-server-python - Risk category: Read (Low risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Allowed ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "list_namespaces", "arguments": {} } } ``` ## Why list_namespaces is rated Low The 'list' prefix strongly signals a read-only query operation that retrieves namespace information without modification. This is consistent with the Read category (search, list, get, fetch). The low severity reflects minimal blast radius—querying available namespaces carries no risk of data loss, financial impact, or unintended execution. From the tool's own definition: "Tool name 'list_namespaces' indicates a listing/querying operation. The tool sits in a workflow management server alongside flow/execution management tools, and 'list' operations are read-only retrieval of metadata (namespaces)." ## Use case AI agents call list_namespaces to retrieve information from Kestra Python MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere. ## Recommended policy (PolicyLayer) Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Kestra Python MCP Server: ```json { "version": "1", "default": "deny", "tools": { "list_namespaces": {} } } ``` ## Other tools on Kestra Python MCP Server (38) - `delete_execution_logs` — Destructive — https://policylayer.com/tools/kestra-io-mcp-server-python/delete-execution-logs.md - `delete_flow_logs` — Destructive — https://policylayer.com/tools/kestra-io-mcp-server-python/delete-flow-logs.md - `backfill_executions` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/backfill-executions.md - `change_taskrun_state` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/change-taskrun-state.md - `execute_flow` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/execute-flow.md - `force_run_execution` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/force-run-execution.md - `manage_executions` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/manage-executions.md - `replay_execution` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/replay-execution.md - `restart_execution` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/restart-execution.md - `resume_execution` — Execute — https://policylayer.com/tools/kestra-io-mcp-server-python/resume-execution.md - `generate_app` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/generate-app.md - `generate_dashboard` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/generate-dashboard.md - `generate_test` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/generate-test.md - `manage_apps` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/manage-apps.md - `manage_group` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/manage-group.md - `manage_tests` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/manage-tests.md - `namespace_directory_action` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/namespace-directory-action.md - `namespace_file_action` — Other — https://policylayer.com/tools/kestra-io-mcp-server-python/namespace-file-action.md - `download_execution_logs` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/download-execution-logs.md - `find_flow` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/find-flow.md - `follow_execution_logs` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/follow-execution-logs.md - `get_execution_logs` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/get-execution-logs.md - `get_instance_info` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/get-instance-info.md - `list_executions` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/list-executions.md - `list_flows_in_namespace` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/list-flows-in-namespace.md - `list_flows_with_triggers` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/list-flows-with-triggers.md - `list_namespace_dependencies` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/list-namespace-dependencies.md - `search_apps` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/search-apps.md - `search_flows` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/search-flows.md - `search_logs` — Read — https://policylayer.com/tools/kestra-io-mcp-server-python/search-logs.md - …and 8 more: https://policylayer.com/tools/kestra-io-mcp-server-python.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=kestra-io-mcp-server-python · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/kestra-io-mcp-server-python