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Day to Night

day_to_night

Day to dusk (virtual twilight): turn a daytime listing photo into a magazine-style evening scene — lights on, warm glow, dusk sky — with the building and camera angle unchanged. Costs credits from the user's Pixly balance.

Input Schema

NameRequiredDescriptionDefault
r2PathNoStorage path of a photo already in the user's Pixly library (from list_library, or returned by an upload ticket) — the alternative to imageUrl.
imageUrlNoPublic https URL of the source photo, or a data: URI. Either imageUrl or r2Path is required.
listingIdNoA property folder (from list_listings or create_listing) to put the result in. Results of a photo that is already in a folder go there by themselves.

Output Schema

NameRequiredDescriptionDefault
jobsNoSeveral jobs at once (get_job with jobIds, or a plan's steps): each one's jobId, status and results
noteNo
typeNo
errorNo
jobIdYesPass to get_job to poll
quoteNoPresent when status is "awaiting_confirmation": nothing ran and nothing was charged yet — the price and settings the user is asked to confirm
statusYespending | processing | completed | failed — anything not completed/failed is still running
createdAtNo
resultUrlsNoPresent when completed; valid 7 days
completedAtNo
resultPathsNoStorage path of each result — pass one as r2Path (or beforeR2Path, a photos[] item) to run another tool on this result
creditsChargedNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • addedInput schema / properties / listingId
      Added value: +{
      +  "description": "A property folder (from list_listings or create_listing) to put the result in. Results of a photo that is already in a folder go there by themselves.",
      +  "type": "string"
      +}
    • addedOutput schema / properties / jobs
      Added value: +{
      +  "description": "Several jobs at once (get_job with jobIds, or a plan's steps): each one's jobId, status and results",
      +  "items": {
      +    "type": "object"
      +  },
      +  "type": "array"
      +}
  2. Changed1 schema field changed
    • addedOutput schema / properties / quote
      Added value: +{
      +  "description": "Present when status is \"awaiting_confirmation\": nothing ran and nothing was charged yet — the price and settings the user is asked to confirm",
      +  "type": "object"
      +}
  3. Changed1 schema field changed
    • addedOutput schema / properties / resultPaths
      Added value: +{
      +  "description": "Storage path of each result — pass one as r2Path (or beforeR2Path, a photos[] item) to run another tool on this result",
      +  "items": {
      +    "type": "string"
      +  },
      +  "type": "array"
      +}
  4. Changed1 schema field changed
    • changedInput schema / properties / r2Path / description
      Previous value: -"R2 object path from an upload ticket (the create_upload_ticket tool, or POST /api/v1/uploads over REST) — the alternative to imageUrl when the photo is a local file."New value: +"Storage path of a photo already in the user's Pixly library (from list_library, or returned by an upload ticket) — the alternative to imageUrl."
  5. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "properties": {
      +    "completedAt": {
      +      "type": "string"
      +    },
      +    "createdAt": {
      +      "type": "string"
      +    },
      +    "creditsCharged": {
      +      "type": [
      +        "number",
      +        "null"
      +      ]
      +    },
      +    "error": {
      +      "type": "string"
      +    },
      +    "jobId": {
      +      "description": "Pass to get_job to poll",
      +      "type": "string"
      +    },
      +    "note": {
      +      "type": "string"
      +    },
      +    "resultUrls": {
      +      "description": "Present when completed; valid 7 days",
      +      "items": {
      +        "type": "string"
      +      },
      +      "type": "array"
      +    },
      +    "status": {
      +      "description": "pending | processing | completed | failed — anything not completed/failed is still running",
      +      "type": "string"
      +    },
      +    "type": {
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "jobId",
      +    "status"
      +  ],
      +  "type": "object"
      +}
  6. Changed1 schema field changed
    • changedInput schema / properties / r2Path / description
      Previous value: -"R2 object path from an upload ticket (POST /api/v1/uploads) — the alternative to imageUrl when the photo is a local file."New value: +"R2 object path from an upload ticket (the create_upload_ticket tool, or POST /api/v1/uploads over REST) — the alternative to imageUrl when the photo is a local file."
  7. First observed

TDQS

A3.7/5.0
Behavior4/5

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

Annotations already declare the safety profile (non-read-only, non-idempotent, non-destructive, open-world). The description adds genuinely useful context beyond them: the operation consumes credits from the user's Pixly balance, and the output preserves the building and camera angle. It does not state whether the source image is left intact or what happens on repeated calls, so it stops short of a 5.

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

Conciseness4/5

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

Front-loaded with the transformation and its alias (virtual twilight), followed by the visual effects and then the credit cost. Two sentences with no filler; the em-dash effect list is dense but each item earns its place.

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?

An output schema exists, so return values need not be explained, and annotations cover the mutation/safety profile. The description supplies the cost behavior and output constraints an agent needs to decide and call correctly; only the treatment of the original image and failure/credit-refund behavior are absent.

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 r2Path, imageUrl, and listingId are fully documented in the schema, including the either/or requirement. The description adds no parameter-level detail, which is the expected baseline when the schema carries the load.

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 transformation verb and resource: turn a daytime listing photo into an evening/dusk scene, with concrete visual outcomes (lights on, warm glow, dusk sky) and a preserved constraint (building and camera angle unchanged). It is clearly distinguishable in substance from siblings like replace_sky or reset_season, though it never names a sibling to route against.

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?

Implies the usage context (a daytime listing photo) but gives no explicit when-to-use/when-not-to-use and names no alternatives among the many photo-transformation siblings (replace_sky, reset_season, enhance_photo). The agent must infer the boundary itself.

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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