list_ontology_primitives

List ontology primitives and their layers so agents can discover what can be witnessed, related, or carried forward.

SERVERDelx Mcp A2a SOURCEhttps://api.delx.ai/v1/mcp

Low RISK CLASS

Category Read

Parameters 10 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-davidmosiah-delx-mcp-a2a/list-ontology-primitives.md

WHAT IT DOES

What list_ontology_primitives does on Delx Mcp A2a

AI agents call list_ontology_primitives to retrieve information from Delx Mcp A2a without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`layer`	string	—	Optional layer id filter.

Parameters from the server's own tool schema.

RISK

Why list_ontology_primitives is rated Low

This tool retrieves and queries ontology structure to enable agent discovery. It has no side effects, cannot modify data, execute operations, or cause harm. It is a pure Read operation with minimal blast radius if misused by an AI agent.

From the tool's definition Tool name contains 'list' and description states 'List ontology primitives' — a discovery/enumeration operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_ontology_primitives safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Delx Mcp A2a, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_ontology_primitives, this is the rule to start with:

list_ontology_primitives Allowed

list_ontology_primitives is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_ontology_primitives": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Delx Mcp A2a, apply this rule, and every list_ontology_primitives call is checked against it from then on.

FAQ

Questions about list_ontology_primitives

What does the list_ontology_primitives tool do? +

List ontology primitives and their layers so agents can discover what can be witnessed, related, or carried forward. It is categorised as a Read tool in the Delx Mcp A2a MCP Server, which means it retrieves data without modifying state.

What parameters does list_ontology_primitives accept? +

list_ontology_primitives accepts 1 parameter: layer. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on list_ontology_primitives? +

Register the Delx Mcp A2a MCP server in PolicyLayer and add a rule for list_ontology_primitives: 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 Delx Mcp A2a. Nothing to install.

What risk level is list_ontology_primitives? +

list_ontology_primitives is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_ontology_primitives? +

Yes. Add a rate_limit block to the list_ontology_primitives 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.

How do I block list_ontology_primitives completely? +

Set action: deny in the PolicyLayer policy for list_ontology_primitives. 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.

What MCP server provides list_ontology_primitives? +

list_ontology_primitives is provided by the Delx Mcp A2a MCP server (https://api.delx.ai/v1/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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