collab_session_join

Join an open collab session as Live agent/MCP.

SERVERDual Registry SOURCEhttps://www.dualregistry.dev/api/protocol

Low RISK CLASS

Category Read

Parameters 42 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dev-dualregistry-registry/collab-session-join.md

WHAT IT DOES

What collab_session_join does on Dual Registry

AI agents call collab_session_join to retrieve information from Dual Registry 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
`kind`	string	—
`agent_name`	string	—
`listing_id`	string	Yes
`session_id`	string	Yes

Parameters from the server's own tool schema.

RISK

Why collab_session_join is rated Low

Even though collab_session_join only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs collab_session_join safely

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

collab_session_join Allowed

collab_session_join 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": {
    "collab_session_join": {}
  }
}

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

The button opens the PolicyLayer dashboard: create your workspace, connect Dual Registry, apply this rule, and every collab_session_join call is checked against it from then on.

FAQ

Questions about collab_session_join

What does the collab_session_join tool do? +

Join an open collab session as Live agent/MCP. It is categorised as a Read tool in the Dual Registry MCP Server, which means it retrieves data without modifying state.

What parameters does collab_session_join accept? +

collab_session_join accepts 4 parameters: kind, agent_name, listing_id, session_id. Required: listing_id, session_id. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on collab_session_join? +

Register the Dual Registry MCP server in PolicyLayer and add a rule for collab_session_join: 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 Dual Registry. Nothing to install.

What risk level is collab_session_join? +

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

Can I rate-limit collab_session_join? +

Yes. Add a rate_limit block to the collab_session_join 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 collab_session_join completely? +

Set action: deny in the PolicyLayer policy for collab_session_join. 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 collab_session_join? +

collab_session_join is provided by the Dual Registry MCP server (https://www.dualregistry.dev/api/protocol). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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