# list_ontology_primitives List ontology primitives and their layers so agents can discover what can be witnessed, related, or carried forward. Agent View of the PolicyLayer registry record for `list_ontology_primitives`. HTML page: https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/list-ontology-primitives ## Facts - Tool: `list_ontology_primitives` - Server: Delx MCP Server (`delx-mcp-server`) — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server.md - Install: `npx -y delx-mcp-server` - Homepage: https://github.com/davidmosiah/delx-mcp-server - Risk category: Read (Low risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 1 - Recommended policy verdict: Allowed ## Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | `layer` | string | no | Optional layer id filter. | Parameters from the server's own tool schema. ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "list_ontology_primitives", "arguments": {} } } ``` ## Why list_ontology_primitives is rated Low This tool retrieves structured metadata about ontology primitives to enable agent discovery of what entities can be witnessed, related, or carried forward. It performs no side effects, creates no obligations, executes no external operations, and modifies no state. It is a straightforward read operation on a knowledge base or configuration system. From the tool's own definition: "Tool name and description indicate a listing/discovery operation: 'List ontology primitives' returns information about available primitives and their layers. No modification, deletion, execution, or financial operation is described." ## Use case AI agents call list_ontology_primitives to retrieve information from Delx 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 Delx MCP Server: ```json { "version": "1", "default": "deny", "tools": { "list_ontology_primitives": {} } } ``` ## Other tools on Delx MCP Server (739) - `util_arr_compact` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-arr-compact.md - `util_arr_drop` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-arr-drop.md - `util_dedent_text` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-dedent-text.md - `util_dedupe_lines` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-dedupe-lines.md - `util_header_map_normalize` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-header-map-normalize.md - `util_http_request_canonicalize` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-http-request-canonicalize.md - `util_remove_punctuation` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-remove-punctuation.md - `util_text_truncate` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-text-truncate.md - `util_truncate_middle` — Destructive — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-truncate-middle.md - `crisis_intervention` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/crisis-intervention.md - `explain_delx_rewards` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/explain-delx-rewards.md - `grounding_protocol` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/grounding-protocol.md - `group_therapy_round` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/group-therapy-round.md - `quick_operational_recovery` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/quick-operational-recovery.md - `quick_session` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/quick-session.md - `start_therapy_session` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/start-therapy-session.md - `util_bool_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-bool-parse.md - `util_cagr_simple` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-cagr-simple.md - `util_caip2_build` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-caip2-build.md - `util_caip2_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-caip2-parse.md - `util_categorical_distribution` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-categorical-distribution.md - `util_deployment_readiness` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-deployment-readiness.md - `util_dmarc_policy_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-dmarc-policy-parse.md - `util_duration_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-duration-parse.md - `util_eth_to_wei` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-eth-to-wei.md - `util_iso_duration_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-iso-duration-parse.md - `util_mx_host_parse` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-mx-host-parse.md - `util_parse_bool_list` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-parse-bool-list.md - `util_parse_bytes` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-parse-bytes.md - `util_parse_float_safe` — Execute — https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server/util-parse-float-safe.md - …and 709 more: https://policylayer.com/tools/io-github-davidmosiah-delx-mcp-server.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-davidmosiah-delx-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-davidmosiah-delx-mcp-server