trigger_presentation_previous
Trigger the previous cue in a specific presentation by UUID
This record as markdown: /tools/io-github-alxpark-propresenter-mcp/trigger-presentation-previous.md
What trigger_presentation_previous does on Propresenter
AI agents invoke trigger_presentation_previous to trigger actions in Propresenter. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why trigger_presentation_previous is rated High
This tool triggers a presentation control action (moving to previous cue) in ProPresenter 7, which is an external operation that changes the state of a running presentation. While not destructive or financial, it executes an action whose outcome depends on arguments provided. The 'trigger' terminology and action-based nature classify it as Execute rather than Write.
From the tool's definition Tool name contains 'trigger' and description states 'Trigger the previous cue in a specific presentation', indicating it executes an external operation (advancing presentation state) whose effects depend on the presentation UUID argument.
Attacks that exploit this kind of access
The rule that runs trigger_presentation_previous safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Propresenter, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For trigger_presentation_previous, this is the rule to start with:
trigger_presentation_previous stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Propresenter, apply this rule, and every trigger_presentation_previous call is checked against it from then on.
Questions about trigger_presentation_previous
Trigger the previous cue in a specific presentation by UUID. It is categorised as a Execute tool in the Propresenter MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Propresenter MCP server in PolicyLayer and add a rule for trigger_presentation_previous: 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 Propresenter. Nothing to install.
trigger_presentation_previous is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the trigger_presentation_previous 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.
Set action: deny in the PolicyLayer policy for trigger_presentation_previous. 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.
trigger_presentation_previous is provided by the Propresenter MCP server (@alxpark/propresenter-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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