Memesio Meme Generator

Generate meme

generate_meme

Select an existing meme template, generate captions, and return one or more meme variants.

Input Schema

TableJSON Schema

Name	Required	Description
`mode`	No	Generation mode. Only template-based meme generation is supported.
`tone`	No	Caption tone. Use this to steer the humor style, for example absurd or corporate.
`apiKey`	Yes	Agent or developer API key for AI meme generation.
`prompt`	Yes	Prompt describing the meme concept to generate.
`toneCues`	No	Optional extra style cues such as dry, playful, or bunny-coded.
`rewriteNote`	No	Optional rewrite direction that pushes the joke toward a specific flavor.
`variantCount`	No	How many meme variants to generate in one call. Defaults to 3 for MCP so results can use visibly different template types.
`allowHeuristicFallback`	No	Whether Memesio may fall back to heuristic captions if OpenAI captioning is unavailable. Defaults to false for keyed API/MCP calls.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedJul 8, 2026

changedInput schema / properties / variantCount / description

Previous value: -"How many meme variants to generate in one call."New value: +"How many meme variants to generate in one call. Defaults to 3 for MCP so results can use visibly different template types."

Changed4 schema fields changedJul 6, 2026

addedInput schema / properties / allowHeuristicFallback

Added value: +{
+  "description": "Whether Memesio may fall back to heuristic captions if OpenAI captioning is unavailable. Defaults to false for keyed API/MCP calls.",
+  "type": "boolean"
+}

addedInput schema / properties / rewriteNote

Added value: +{
+  "description": "Optional rewrite direction that pushes the joke toward a specific flavor.",
+  "maxLength": 160,
+  "minLength": 1,
+  "type": "string"
+}

addedInput schema / properties / tone

Added value: +{
+  "description": "Caption tone. Use this to steer the humor style, for example absurd or corporate.",
+  "enum": [
+    "sarcastic",
+    "deadpan",
+    "wholesome",
+    "absurd",
+    "corporate",
+    "dark-lite",
+    "brand"
+  ],
+  "type": "string"
+}

addedInput schema / properties / toneCues

Added value: +{
+  "description": "Optional extra style cues such as dry, playful, or bunny-coded.",
+  "items": {
+    "maxLength": 40,
+    "minLength": 1,
+    "type": "string"
+  },
+  "maxItems": 6,
+  "type": "array"
+}

Changed4 schema fields changedJul 6, 2026

removedInput schema / properties / allowHeuristicFallback

Removed value: -{
-  "description": "Whether Memesio may fall back to heuristic captions if OpenAI captioning is unavailable. Defaults to false for keyed API/MCP calls.",
-  "type": "boolean"
-}

removedInput schema / properties / rewriteNote

Removed value: -{
-  "description": "Optional rewrite direction that pushes the joke toward a specific flavor.",
-  "maxLength": 160,
-  "minLength": 1,
-  "type": "string"
-}

removedInput schema / properties / tone

Removed value: -{
-  "description": "Caption tone. Use this to steer the humor style, for example absurd or corporate.",
-  "enum": [
-    "sarcastic",
-    "deadpan",
-    "wholesome",
-    "absurd",
-    "corporate",
-    "dark-lite",
-    "brand"
-  ],
-  "type": "string"
-}

removedInput schema / properties / toneCues

Removed value: -{
-  "description": "Optional extra style cues such as dry, playful, or bunny-coded.",
-  "items": {
-    "maxLength": 40,
-    "minLength": 1,
-    "type": "string"
-  },
-  "maxItems": 6,
-  "type": "array"
-}

Changed1 schema field changedMay 5, 2026

changedInput schema / properties / tone / enum

Previous value: -[
-  "sarcastic",
-  "wholesome",
-  "absurd",
-  "corporate",
-  "dark-lite",
-  "brand"
-]New value: +[
+  "sarcastic",
+  "deadpan",
+  "wholesome",
+  "absurd",
+  "corporate",
+  "dark-lite",
+  "brand"
+]

Changed4 schema fields changedApr 16, 2026

addedInput schema / properties / allowHeuristicFallback

Added value: +{
+  "description": "Whether Memesio may fall back to heuristic captions if OpenAI captioning is unavailable. Defaults to false for keyed API/MCP calls.",
+  "type": "boolean"
+}

addedInput schema / properties / rewriteNote

Added value: +{
+  "description": "Optional rewrite direction that pushes the joke toward a specific flavor.",
+  "maxLength": 160,
+  "minLength": 1,
+  "type": "string"
+}

addedInput schema / properties / tone

Added value: +{
+  "description": "Caption tone. Use this to steer the humor style, for example absurd or corporate.",
+  "enum": [
+    "sarcastic",
+    "wholesome",
+    "absurd",
+    "corporate",
+    "dark-lite",
+    "brand"
+  ],
+  "type": "string"
+}

addedInput schema / properties / toneCues

Added value: +{
+  "description": "Optional extra style cues such as dry, playful, or bunny-coded.",
+  "items": {
+    "maxLength": 40,
+    "minLength": 1,
+    "type": "string"
+  },
+  "maxItems": 6,
+  "type": "array"
+}

Changed2 schema fields changedMar 22, 2026

changedInput schema / properties / mode / description

Previous value: -"Generation style or retrieval mode to prefer."New value: +"Generation mode. Only template-based meme generation is supported."

changedInput schema / properties / mode / enum

Previous value: -[
-  "template",
-  "minimalist",
-  "hybrid"
-]New value: +[
+  "template"
+]

First observedMar 15, 2026

TDQS

A3.7/5.0

Behavior3/5

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

Annotations already declare non-read-only, open-world, and non-idempotent behavior. The description adds that template selection occurs and multiple variants are returned, which is useful but does not disclose fallback behavior (e.g., allowHeuristicFallback) or external service dependencies. No contradiction with annotations.

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?

The description is a single, front-loaded sentence with no redundant words. It efficiently conveys the core function without fluff.

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

Completeness3/5

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

For a tool with 8 parameters, no output schema, and moderate complexity, the description is terse. It does not explain the return format or how template selection works, but the schema fills in parameter details. The description is adequate but not comprehensive for an agent to fully anticipate tool behavior.

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 coverage is 100% with detailed descriptions for all 8 parameters, so the description need not repeat parameter meanings. Baseline 3 is appropriate as the description adds no parameter-level detail beyond what the schema already provides.

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?

The description states a clear action: 'Select an existing meme template, generate captions, and return one or more meme variants.' This is a specific verb+resource description that distinguishes it from siblings like generate_gif (which makes GIFs) and caption_template (which may only caption).

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?

The description implies usage for creating meme variants from templates but does not explicitly compare with sibling tools such as caption_template, search_templates, or get_template_ideas. There is no when-to-use guidance or exclusion, so it relies on the agent to infer the appropriate context.

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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