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Pedra MCP Server

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by pedra-ai
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Remote

Empty room

pedra_empty_room

Remove all furniture and objects from a room to create an empty space, returning the emptied image URL. Optionally save the result to a property's gallery by passing a propertyId.

Instructions

Remove all furniture and objects from a room, leaving an empty space. Returns the emptied image URL. Pass propertyId to save the result into that property's gallery instead of only returning a URL.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameNoOptional name for the original photo (e.g. its file name), up to 200 characters. Only used with propertyId: if the photo isn't in that property yet, it's saved there under this name in the same call and returned as source.name. A photo already in the property keeps its name. Never shown on the image.
imageUrlYesSource image: a public https:// URL, a data: URI, or an absolute path to a local image file on this computer (the file is read and inlined automatically). If the photo is on the user's device and can't be read from here (e.g. it's on their phone), get a link from pedra_create_upload_link.
propertyIdNoOptional id of the Pedra property (from pedra_list_properties) this photo belongs to. When set, the result is saved into that property's gallery — visible and editable from the app — instead of only being returned as a URL.
preserveAspectRatioNoBy default the output comes back at whatever size the AI model produces, which may not match the input's aspect ratio or resolution. Set to true to get the result at the exact width and height of the input image (center-cropped to the original aspect ratio, never stretched). Defaults to false.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changedv0.6.0
    • addedInput schema / properties / name
      Added value: +{
+  "description": "Optional name for the original photo (e.g. its file name), up to 200 characters. Only used with propertyId: if the photo isn't in that property yet, it's saved there under this name in the same call and returned as source.name. A photo already in the property keeps its name. Never shown on the image.",
+  "maxLength": 200,
+  "type": "string"
+}
    • addedInput schema / properties / preserveAspectRatio
      Added value: +{
+  "description": "By default the output comes back at whatever size the AI model produces, which may not match the input's aspect ratio or resolution. Set to true to get the result at the exact width and height of the input image (center-cropped to the original aspect ratio, never stretched). Defaults to false.",
+  "type": "boolean"
+}
    • addedInput schema / properties / propertyId
      Added value: +{
+  "description": "Optional id of the Pedra property (from pedra_list_properties) this photo belongs to. When set, the result is saved into that property's gallery — visible and editable from the app — instead of only being returned as a URL.",
+  "type": "string"
+}
  2. Changed1 schema field changedv0.5.1
    • changedInput schema / properties / imageUrl / description
      Previous value: -"Source image: a public https:// URL, a data: URI, or an absolute path to a local image file (the file is read and inlined automatically)."New value: +"Source image: a public https:// URL, a data: URI, or an absolute path to a local image file on this computer (the file is read and inlined automatically). If the photo is on the user's device and can't be read from here (e.g. it's on their phone), get a link from pedra_create_upload_link."
  3. Changed1 schema field changedv0.1.2
    • changedInput schema / properties / imageUrl / description
      Previous value: -"URL (or data: URL) of the source image."New value: +"Source image: a public https:// URL, a data: URI, or an absolute path to a local image file (the file is read and inlined automatically)."
  4. First observedv0.1.0

TDQS

A3.8/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations cover the safety profile (readOnlyHint=false, destructiveHint=false), so the bar is lower. The description adds useful behavior beyond them: it explains what is produced (an emptied image URL) and that passing propertyId persists the result into a property gallery rather than only returning a URL. It does not contradict the non-destructive hint since the source image is only edited.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two tight sentences with zero waste; the core action is front-loaded and the persistence nuance follows.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

There is no output schema, and the description compensates by stating the return value (emptied image URL) plus the gallery-save variant. Combined with fully documented parameters, an agent has nearly everything needed, with only when-to-use guidance missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents all four parameters in more detail than the description. The description's propertyId note merely restates the schema's save-into-gallery behavior, adding no syntax or default information beyond it.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Remove all furniture and objects from a room, leaving an empty space') and the outcome. It is clearly distinct from siblings like pedra_furnish and pedra_remove_object, though it never names an alternative explicitly to sharpen that contrast.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives implied context via the imageUrl/propertyId workflow, but never says when to choose this over pedra_remove_object or pedra_furnish, nor any prerequisites. Usage is inferable rather than stated.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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