pptx-mcp
A FastMCP-powered server for programmatically creating, editing, and rendering PowerPoint (PPTX) presentations with features for slide creation, content insertion, and PNG rendering.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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samos123
Source: mcp.so · also listed on ModelScope
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
create_or_clear_presentationCreates a new, empty presentation with the given filename, or clears an existing one. Overwrites if the file exists.
add_slideAdds a new slide to the presentation using a specified layout index. Common layouts: 0=Title, 1=Title+Content, 5=Title Only, 6=Blank. Returns the index of the newly added slide.
add_title_and_contentAdds text to the title and main content placeholder of a specific slide. Assumes the slide layout has these placeholders (e.g., layout index 1).
add_textboxAdds a textbox with specified text, position, and dimensions (in inches) to a slide. Set font_size_pt to 0 or less to use the default font size.
add_shapeAdds an AutoShape (like RECTANGLE, OVAL, FLOWCHART_PROCESS) to a slide. Specify position and dimensions in inches. Optionally add text to the shape. Returns a confirmation message including the unique ID of the created shape.
add_connectorAdds a connector shape between two existing shapes identified by their IDs. Defaults to an ELBOW connector from the right side of the start shape to the left side of the end shape.
delete_shapeDeletes a specific shape from a slide using its unique ID.
modify_shapeModifies properties of an existing shape identified by its ID. Allows changing text, position, size, font attributes, fill color, and line style. Only provided parameters are changed.
add_pictureAdds a picture to a slide from provided image data. Specify position in inches. Optionally specify width OR height in inches to scale. If neither width nor height is given, the image's native size is used.
get_slide_imageRenders a specific slide as a PNG image using LibreOffice and returns it as an Image object. Requires LibreOffice installed and accessible on the server. May be slow. Use get_slide_content_description for a faster, text-based check.
get_presentation_file_b64Returns the content of the presentation file encoded as a Base64 string. Useful if the client cannot handle MCP resources or direct file paths.
batch_updatePerforms a series of operations on a presentation in a single batch. Similar to Google Slides API batchUpdate. Allows creating slides, adding shapes, text, pictures, connectors, modifying and deleting shapes. Operations are performed sequentially. If any operation fails, the entire batch is aborted,…
HOST(default: 127.0.0.1)ProgramFilesPORTTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
12/12 tools missing one or more hints — create_or_clear_presentation (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); add_slide (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); add_title_and_content (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +9 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — get_slide_image (line 721: process = subprocess.run(cmd, capture_output=True, text=True, check=False, timeout=timeout_seconds))
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
Tool test coverage
8/12 tools referenced in tests (67%)
Write tests that reference each tool by name so every tool has at least one test.
Tool description accuracy
get_slide_image: description implies read-only but handler writes/deletes/executes
Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.
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