add_comp_marker

Add a marker to a composition timeline.

SERVERAe SOURCE@synthetic-ai/ae-mcp

Medium RISK CLASS

Category Write

Parameters 92 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/synthetic-ai-ae-mcp/add-comp-marker.md

WHAT IT DOES

What add_comp_marker does on Ae

AI agents use add_comp_marker to create or update resources in Ae, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ae environment.

Parameter	Type	Required	Description
`url`	string	—	Optional URL.
`save`	boolean	—
`time`	number	Yes	Marker time in seconds.
`chapter`	string	—	Optional chapter label.
`comment`	string	—	Optional marker comment.
`compName`	string	Yes
`duration`	number	—	Optional marker duration in seconds.
`timeoutMs`	number	—
`projectPath`	string	—

Parameters from the server's own tool schema.

RISK

Why add_comp_marker is rated Medium

An AI agent can call add_comp_marker faster than any human can review: one bad instruction and it creates or modifies resources in Ae by the hundred, each call as confident as the last.

Risk signalsAccepts URL/endpoint input (url)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs add_comp_marker safely

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

add_comp_marker Rate-limited

add_comp_marker stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add_comp_marker": {
      "limits": [
        {
          "counter": "add_comp_marker_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about add_comp_marker

What does the add_comp_marker tool do? +

Add a marker to a composition timeline. It is categorised as a Write tool in the Ae MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does add_comp_marker accept? +

add_comp_marker accepts 9 parameters: url, save, time, chapter, comment, compName, duration, timeoutMs, projectPath. Required: time, compName. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on add_comp_marker? +

Register the Ae MCP server in PolicyLayer and add a rule for add_comp_marker: 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 Ae. Nothing to install.

What risk level is add_comp_marker? +

add_comp_marker is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit add_comp_marker? +

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

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

add_comp_marker is provided by the Ae MCP server (@synthetic-ai/ae-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Ae, and thousands of servers like it.

This server

All 226 Ae tools →

Across the catalogue

add-tag on Kanban MCP Server →kb_add on Persistent Kb → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →