Tanod Images

imagepeek: convert an image to another format

image_convert

Idempotent

imagepeek: Convert an image to PNG, JPEG, WebP, GIF, TIFF, BMP, ICO or AVIF. To shrink the file use image_compress. Returns the image converted to png, jpeg, webp, gif, tiff, bmp, ico (16-256 px icon sizes) or avif, with quality, progressive JPEG, optimized PNG or lossless WebP; transparency is flattened onto background (default white) for jpeg and bmp. Reads PNG, JPEG, WebP, GIF, TIFF, BMP, ICO and AVIF; other formats and images over 40 megapixels are refused (not charged). Output: base64 data_base64, without EXIF, GPS, XMP or IPTC; over 15 MB or 50 megapixels is a 413 (not charged). Images are not logged; a result is kept only with output "url" (24 h). Typically 0.5-2 s. Price: USD 0.002. Free: 3 imagepeek calls per IP per UTC day. Docs: https://tanod.dev/learn/image-convert-api.html

Input Schema

Name	Required	Description	Default
`to`	Yes	png, jpeg, webp, gif, tiff, bmp, ico or avif.
`url`	No	Public http(s) URL of the image (at most 10 MB; private, internal and IP-literal hosts are refused); or use image_base64.
`output`	No	base64 (default): inline. url: stored for 24 hours; link, metadata.	base64
`quality`	No	Encoder quality 1-100 for lossy formats (default: per format).
`lossless`	No	webp only.
`optimize`	No	png only.
`background`	No	Alpha is flattened onto this for jpeg/bmp (#ffffff).
`auto_orient`	No	Apply the EXIF orientation first (default true).
`progressive`	No	jpeg only.
`image_base64`	No	The image as standard or url-safe base64 (at most 10 MB decoded; a data:image/...;base64, prefix is fine); or use url.

Output Schema

Name	Required	Description
`url`	No	Public link.
`bytes`	No	Bytes.
`error`	No	Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object.
`input`	No
`notes`	No
`width`	No
`format`	No
`height`	No
`sha256`	No	SHA-256.
`source`	No
`final_url`	No
`operation`	No
`expires_at`	No	UTC expiry.
`source_url`	No
`data_base64`	No
`content_type`	No	MIME type.

Schema Changelog

Changes observed during successful MCP inspections.

Changed6 schema fields changedOct 28, 2026

changedInput schema / properties / output / description

Previous value: -"base64 (default): the file comes back inline as base64. url: the file is stored for 24 hours and the reply carries a download link (url, expires_at, bytes, content_type, sha256) instead of the base64, which keeps the file out of your context window."New value: +"base64 (default): inline. url: stored for 24 hours; link, metadata."

addedOutput schema / properties / bytes / description
```
Added value: +"Bytes."
```
addedOutput schema / properties / content_type / description
```
Added value: +"MIME type."
```
addedOutput schema / properties / expires_at / description
```
Added value: +"UTC expiry."
```
addedOutput schema / properties / sha256 / description
```
Added value: +"SHA-256."
```
addedOutput schema / properties / url / description
```
Added value: +"Public link."
```

Changed4 schema fields changedOct 12, 2026

addedInput schema / properties / output

Added value: +{
+  "default": "base64",
+  "description": "base64 (default): the file comes back inline as base64. url: the file is stored for 24 hours and the reply carries a download link (url, expires_at, bytes, content_type, sha256) instead of the base64, which keeps the file out of your context window.",
+  "enum": [
+    "base64",
+    "url"
+  ],
+  "title": "Output",
+  "type": "string"
+}

addedOutput schema / properties / expires_at

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / sha256

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

addedOutput schema / properties / url

Added value: +{
+  "type": [
+    "string",
+    "null"
+  ]
+}

Changed4 schema fields changedOct 8, 2026

addedInput schema / properties / auto_orient / description

Added value: +"Apply the EXIF orientation first (default true)."

addedInput schema / properties / quality / description

Added value: +"Encoder quality 1-100 for lossy formats (default: per format)."

changedInput schema / properties / url / description

Previous value: -"Public http(s) URL of the image (at most 10 MB); or use image_base64."New value: +"Public http(s) URL of the image (at most 10 MB; private, internal and IP-literal hosts are refused); or use image_base64."

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "bytes": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "content_type": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "data_base64": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "error": {
+      "description": "Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object."
+    },
+    "final_url": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "format": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "height": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "input": {
+      "properties": {
+        "animated": {
+          "type": [
+            "boolean",
+            "null"
+          ]
+        },
+        "bytes": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "format": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "frames": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "has_alpha": {
+          "type": [
+            "boolean",
+            "null"
+          ]
+        },
+        "height": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "width": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "notes": {
+      "items": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "type": [
+        "array",
+        "null"
+      ]
+    },
+    "operation": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "source": {
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "source_url": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "width": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

First observedOct 8, 2026

TDQS

A4.8/5.0

Behavior5/5

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

Goes well beyond the annotations (readOnlyHint=false, idempotent, non-destructive): alpha is flattened onto `background` for jpeg/bmp, metadata (EXIF/GPS/XMP/IPTC) is stripped, refusals and 413s are not charged, images are not logged, url results expire after 24 h, and typical latency is 0.5-2 s. This is exactly the kind the annotations cannot convey.

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?

The intent and the sibling alternative are front-loaded and nearly every clause carries information. It loses a point because the format list is enumerated twice (once as the goal, once again as the return value) and the second sentence is an unusually long run-on that an agent must parse for limits.

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

Completeness5/5

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

For a 10-parameter conversion tool with an output schema, everything an agent needs to call it correctly is present: required `to` values, mutually exclusive input sources, per-format option applicability, size/format limits, cost, and return shape. No meaningful gap remains.

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

Parameters4/5

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

Schema coverage is 100%, so baseline is 3, but the description adds real meaning: `background` defaults to white and applies only to jpeg/bmp, `to=ico` yields 16-256 px icon sizes, and quality/progressive/optimize/lossless are tied to specific target formats. Only `auto_orient` and the two input-source parameters are left entirely to the schema.

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

Purpose5/5

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

States a specific verb and resource ('Convert an image to PNG, JPEG, WebP, GIF, TIFF, BMP, ICO or AVIF') and distinguishes itself from a sibling by explicitly deferring file-size reduction to image_compress. An agent can identify this tool's job from the first sentence alone.

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

Usage Guidelines5/5

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

Names the alternative (image_compress) and the condition that selects it, plus explicit boundaries: accepted input formats, the 40-megapixel refusal, the 15 MB / 50 MP output 413, and the free-tier and pricing terms. When-not and alternative routing are both spelled out.

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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