Spytrend

List favourites

list_favorites

Read-onlyIdempotent

List the caller's favourites folders (name, entity_type, item_count). Pass entity_type (creo/webmaster/ad/hub/shop) to filter; omit it to list folders across all types. Pass folder (a folder name) to instead return the ITEMS inside that folder: entity ids for creo/webmaster/ad (usable with get_creative / get_webmaster / get_ad), resolved hub profiles (hub + id + label) for hub folders, and domains for shop folders. Use this to confirm what add_to_favorites saved and to read a folder back. FREE — does not consume quota.

Input Schema

Name	Required	Description	Default
`folder`	No	OPTIONAL folder name; when set, returns the ITEMS inside that folder (ids for creo/webmaster/ad — usable with get_creative/get_webmaster; resolved hub profiles for hub folders; domains for shop folders) instead of the folder list. If a name matches folders of several types, pass entity_type to disambiguate
`entity_type`	No	optional filter: creo, webmaster, ad, hub or shop; omit to list folders of all types

Output Schema

Name	Required	Description
`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.
`folders`	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.
`folder_contents`	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"
+}

Changed2 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"
+}

First observedSep 2, 2026

TDQS

A4.6/5.0

Behavior4/5

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so safety is covered; the description adds non-trivial context: the quota cost, and the fact that output shape changes depending on whether folder is passed. It does not describe pagination or limits, keeping it at 4.

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?

Dense but front-loaded: the dual-mode behavior and the filter come first, then the return contents, then the use case and cost. The middle sentence is long, but every clause carries actionable information.

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?

Despite an output schema existing, the description still spells out what each folder type returns, which is the exact decision-critical detail an agent needs. Nothing needed to call it correctly is missing.

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 would be 3; the description adds value by mapping each entity_type to the sibling tool that consumes the returned ids (get_creative/get_webmaster/get_ad) and by explaining the disambiguation need when a folder name spans types.

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+resource (list the caller's favourites folders) and immediately clarifies the dual behavior: folder list vs. items inside a named folder. An agent can distinguish this from siblings like add_to_favorites or get_creative without opening the schema.

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?

Gives explicit when-to-use ('confirm what add_to_favorites saved', 'read a folder back'), explains the omit-vs-pass condition for entity_type, and the folder-vs-list switch. The 'FREE — does not consume quota' note routes the agent here over quota-consuming siblings when it only needs a read-back.

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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