# trigger_previous_slide Trigger the previous cue in the current presentation Agent View of the PolicyLayer registry record for `trigger_previous_slide`. HTML page: https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/trigger-previous-slide ## Facts - Tool: `trigger_previous_slide` - Server: Propresenter (`@alxpark/propresenter-mcp`) — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp.md - Install: `npx -y @alxpark/propresenter-mcp` - Homepage: https://github.com/alxpark/propresenter-mcp - Risk category: Execute (High risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Rate-limited ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "trigger_previous_slide", "arguments": {} } } ``` ## Why trigger_previous_slide is rated High This falls under Execute because it runs a command that triggers navigation within ProPresenter, an external application. While the action is reversible (users can navigate forward again), the tool directly controls presentation state on a remote system. From the tool's own definition: "The tool is described as 'Trigger the previous cue in the current presentation,' which directly triggers an external operation (slide navigation) in ProPresenter 7. It performs an action with observable effects rather than merely reading or writing data." ## Use case AI agents invoke trigger_previous_slide 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. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Propresenter: ```json { "version": "1", "default": "deny", "tools": { "trigger_previous_slide": { "limits": [ { "counter": "trigger_previous_slide_rate", "window": "minute", "max": 10, "scope": "grant" } ] } } } ``` ## Other tools on Propresenter (176) - `clear_layer` — Destructive — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/clear-layer.md - `messages_delete` — Destructive — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/messages-delete.md - `props_clear` — Destructive — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/props-clear.md - `props_delete` — Destructive — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/props-delete.md - `props_delete_collection` — Destructive — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/props-delete-collection.md - `stage_delete_layout` — Destructive — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/stage-delete-layout.md - `announcement_focus_active` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/announcement-focus-active.md - `announcement_timeline_operation` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/announcement-timeline-operation.md - `announcement_trigger_active` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/announcement-trigger-active.md - `announcement_trigger_cue` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/announcement-trigger-cue.md - `announcement_trigger_next` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/announcement-trigger-next.md - `announcement_trigger_previous` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/announcement-trigger-previous.md - `audio_focus_active_playlist` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-focus-active-playlist.md - `audio_focus_next_playlist` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-focus-next-playlist.md - `audio_focus_playlist` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-focus-playlist.md - `audio_focus_previous_playlist` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-focus-previous-playlist.md - `audio_trigger_active_next` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-active-next.md - `audio_trigger_active_playlist` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-active-playlist.md - `audio_trigger_active_previous` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-active-previous.md - `audio_trigger_focused_next` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-focused-next.md - `audio_trigger_focused_playlist` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-focused-playlist.md - `audio_trigger_focused_previous` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-focused-previous.md - `audio_trigger_playlist` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-playlist.md - `audio_trigger_playlist_item` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/audio-trigger-playlist-item.md - `capture_operation` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/capture-operation.md - `clear_trigger_group` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/clear-trigger-group.md - `find_my_mouse` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/find-my-mouse.md - `focus_active_presentation` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/focus-active-presentation.md - `focus_next_presentation` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/focus-next-presentation.md - `focus_presentation` — Execute — https://policylayer.com/tools/io-github-alxpark-propresenter-mcp/focus-presentation.md - …and 146 more: https://policylayer.com/tools/io-github-alxpark-propresenter-mcp.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-alxpark-propresenter-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-alxpark-propresenter-mcp