Spytrend

Find creatives that look the same

find_similar_creatives

Read-only

Find creatives that look the same as one creative, using the production similarity index. This is visual similarity, not exact creative membership. threshold_status distinguishes an explicitly requested threshold from the production default; result_status=bounded_native_cap means the upstream similarity endpoint exposes at most 20 candidates and has_more is conservative at that cap. Returns metadata without media URLs; use get_media for selected ids. QUOTA: 1 MCP credit per delivered row. PRICING: on paid plans ×1 after 500 MCP credits/month; one-time consent via accept_pricing_terms; before calling, get the maximum debit from estimate_cost (free) and tell the user.

Input Schema

Name	Required	Description
`limit`	No	maximum metadata rows to return (default 20, maximum 20)
`threshold`	No	optional maximum visual difference between two creatives (0 uses the production default; maximum 128 — lower is stricter)
`creative_id`	Yes	source creative UUID from search_creatives

Output Schema

Name	Required	Description
`data`	No
`error`	No	Present only when isError is true: machine-readable failure. The human explanation stays in content.
`params`	No	Request parameter echo: applied = parameters that shaped this result; normalized = parameters rewritten before applying (alias, type coercion, resolved id); ignored = parameters that were accepted but NOT applied, with the reason.
`has_more`	No
`threshold`	No
`addon_hints`	No	Add-on modules that have additional data for objects of this result (no prices, no paid values). subscription_status=active: the account has the module — use its normal path. Do not push a purchase the user did not ask about.
`result_status`	No
`similarity_basis`	No
`threshold_status`	No
`source_creative_id`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 23, 2026

addedOutput schema / properties / addon_hints

Added value: +{
+  "description": "Add-on modules that have additional data for objects of this result (no prices, no paid values). subscription_status=active: the account has the module — use its normal path. Do not push a purchase the user did not ask about.",
+  "items": {
+    "properties": {
+      "available_data_types": {
+        "description": "kinds of data the module confirmedly has for the object",
+        "items": {
+          "type": "string"
+        },
+        "type": "array"
+      },
+      "info_url": {
+        "description": "the object (or its limited breakdown) inside the module on spytrend.com",
+        "type": "string"
+      },
+      "module": {
+        "description": "nutra | crypto | web2app | search_arb | startups",
+        "type": "string"
+      },
+      "object_id": {
+        "description": "the ad id, or the site domain for site rows",
+        "type": "string"
+      },
+      "preland_downloadable": {
+        "description": "Nutra / Crypto: the saved pre-lander can be downloaded in the module",
+        "type": "boolean"
+      },
+      "subscription_status": {
+        "description": "active | not_connected",
+        "type": "string"
+      }
+    },
+    "type": "object"
+  },
+  "type": "array"
+}

Changed3 schema fields changedSep 25, 2026

addedOutput schema / properties / error

Added value: +{
+  "description": "Present only when isError is true: machine-readable failure. The human explanation stays in content.",
+  "properties": {
+    "code": {
+      "description": "fine-grained, stable failure code (e.g. invalid_arguments, backend_busy)",
+      "type": "string"
+    },
+    "kind": {
+      "description": "failure class: invalid_argument, not_found, permission_denied, unauthenticated, quota_exceeded, rate_limited, temporarily_unavailable, unavailable_until_ready, unsupported, internal",
+      "type": "string"
+    },
+    "message": {
+      "description": "the same human text as content[0]",
+      "type": "string"
+    },
+    "outcome": {
+      "description": "activity-feed outcome class",
+      "type": "string"
+    },
+    "param": {
+      "description": "the request parameter the failure is about, when known",
+      "type": "string"
+    },
+    "retry_after_seconds": {
+      "description": "wait this long before retrying",
+      "type": "integer"
+    },
+    "retryable": {
+      "description": "true when repeating the SAME call can succeed (after retry_after_seconds when present)",
+      "type": "boolean"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / params

Added value: +{
+  "description": "Request parameter echo: applied = parameters that shaped this result; normalized = parameters rewritten before applying (alias, type coercion, resolved id); ignored = parameters that were accepted but NOT applied, with the reason.",
+  "properties": {
+    "applied": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "ignored": {
+      "items": {
+        "properties": {
+          "param": {
+            "type": "string"
+          },
+          "reason": {
+            "type": "string"
+          },
+          "to": {
+            "description": "the parameter it was applied as, when renamed",
+            "type": "string"
+          },
+          "value": {
+            "description": "the value actually applied, when rewritten",
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "normalized": {
+      "items": {
+        "properties": {
+          "param": {
+            "type": "string"
+          },
+          "reason": {
+            "type": "string"
+          },
+          "to": {
+            "description": "the parameter it was applied as, when renamed",
+            "type": "string"
+          },
+          "value": {
+            "description": "the value actually applied, when rewritten",
+            "type": "string"
+          }
+        },
+        "type": "object"
+      },
+      "type": "array"
+    }
+  },
+  "type": "object"
+}

removedOutput schema / required

Removed value: -[
-  "source_creative_id",
-  "similarity_basis",
-  "threshold",
-  "threshold_status",
-  "data",
-  "has_more",
-  "result_status"
-]

First observedSep 2, 2026

TDQS

A4.6/5.0

Behavior5/5

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

Beyond the readOnly/openWorld annotations, it discloses the upstream 20-candidate cap and that has_more is conservative at that cap, explains threshold_status and result_status semantics, warns that no media URLs are returned, and lays out quota (1 credit/row) and pricing (×1 after 500 credits/month). This is unusually rich behavioral context for an agent to reason about cost and result completeness.

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 core purpose and the key disambiguation (visual vs membership) before the operational notes. Dense but every sentence carries information; the status-code explanations add length though a slightly tighter phrasing could carry the same signal.

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?

An output schema exists, so return values needn't be re-explained; instead the description covers the operational gaps an agent would otherwise stumble on — the 20-row native cap, conservative has_more, absence of media URLs, and the quota/pricing/consent path. Complete for a 3-param, capped similarity search.

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 creative_id, limit, and threshold are already documented including defaults and max values. The description adds marginal framing (threshold_status distinguishes explicit vs default) but no new parameter syntax or format beyond the schema. Baseline 3 is appropriate.

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 ('Find creatives that look the same as one creative') and explicitly scopes it as visual similarity rather than exact creative membership. It also names sibling tools (search_creatives for the source id, get_media for media) so the agent can place it in the tool graph immediately.

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?

Explicitly distinguishes the use case from exact-membership lookups, directs the agent to get_media for selected ids, and prescribes the pricing workflow ('get the maximum debit from estimate_cost (free) and tell the user' plus one-time accept_pricing_terms consent). When/when-not guidance and alternatives are both present.

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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