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Search Facebook Marketplace locations

facebook_marketplace_locations_search
Read-only

Search Facebook Marketplace locations to obtain coordinates for listing search. Accepts a city or place name. Returns a list (use cursor when paginated).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
qNoAlias for `query`. Prefer `query`.
trimNoIgnored if this tool does not support it.
limitNoIgnored if this tool does not support it.
queryNoCity or place name to search for Facebook Marketplace locations.
offsetNoIgnored if this tool does not support it.
contextYesDescribe the user's underlying goal in one sentence — not the tool you are calling.
keywordsNoAlias for `query`. Prefer `query`.
pageSizeNoIgnored if this tool does not support it.
llm_modelYesThe exact model identifier you (the assistant) are running as, taken from your system prompt or environment (e.g. "claude-opus-4-8", "gpt-5.2"). Used for analytics only. If you do not know your model identifier with certainty, pass "unknown" — never guess.
maxResultsNoIgnored if this tool does not support it.
max_resultsNoIgnored if this tool does not support it.
conversation_idNoEcho the conversation_id from the server's previous response. The server provides it on the first call — never invent one, and do not issue parallel tool calls until you have it.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed9 schema fields changed
    • addedInput schema / properties / keywords
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Alias for `query`. Prefer `query`."
      +}
    • addedInput schema / properties / limit
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Ignored if this tool does not support it."
      +}
    • addedInput schema / properties / maxResults
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Ignored if this tool does not support it."
      +}
    • addedInput schema / properties / max_results
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Ignored if this tool does not support it."
      +}
    • addedInput schema / properties / offset
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Ignored if this tool does not support it."
      +}
    • addedInput schema / properties / pageSize
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Ignored if this tool does not support it."
      +}
    • addedInput schema / properties / q
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Alias for `query`. Prefer `query`."
      +}
    • addedInput schema / properties / trim
      Added value: +{
      +  "anyOf": [
      +    {
      +      "type": "string"
      +    },
      +    {
      +      "type": "number"
      +    },
      +    {
      +      "type": "boolean"
      +    }
      +  ],
      +  "description": "Ignored if this tool does not support it."
      +}
    • changedInput schema / required
      Previous value: -[
      -  "query",
      -  "context",
      -  "llm_model"
      -]New value: +[
      +  "context",
      +  "llm_model"
      +]
  2. Changed5 schema fields changed
    • removedInput schema / additionalProperties
      Removed value: -false
    • addedInput schema / properties / context
      Added value: +{
      +  "description": "Describe the user's underlying goal in one sentence — not the tool you are calling.",
      +  "type": "string"
      +}
    • addedInput schema / properties / conversation_id
      Added value: +{
      +  "description": "Echo the conversation_id from the server's previous response. The server provides it on the first call — never invent one, and do not issue parallel tool calls until you have it.",
      +  "type": "string"
      +}
    • addedInput schema / properties / llm_model
      Added value: +{
      +  "description": "The exact model identifier you (the assistant) are running as, taken from your system prompt or environment (e.g. \"claude-opus-4-8\", \"gpt-5.2\"). Used for analytics only. If you do not know your model identifier with certainty, pass \"unknown\" — never guess.",
      +  "type": "string"
      +}
    • changedInput schema / required
      Previous value: -[
      -  "query"
      -]New value: +[
      +  "query",
      +  "context",
      +  "llm_model"
      +]
  3. Changed1 schema field changed
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
  4. Changed1 schema field changed
    • addedInput schema / additionalProperties
      Added value: +false
  5. First observed

TDQS

A3.7/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true and openWorldHint=true, covering the safety profile. The description adds useful context: it returns a list and mentions cursor-based pagination. However, the cursor note mildly conflicts with the schema's offset/limit parameters, creating ambiguity about actual pagination behavior.

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?

Two sentences with zero waste, front-loading the core purpose before the input/output details. Every clause earns its place.

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?

The core function (location search returning coordinates) is clear and no output schema exists to carry the return-format burden. However, the pagination guidance ('use cursor') conflicts with the schema's offset/limit/pageSize parameters, and the description doesn't clarify which of the many noise parameters actually matter. This leaves ambiguity for a tool with 12 parameters.

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 baseline is 3. The description adds the semantic that the query is a city or place name, which maps to the `query` parameter. But with 12 parameters including many noise aliases marked 'Ignored if this tool does not support it', the description does not help disambiguate which pagination parameters are active, which is a missed opportunity.

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 (search), resource (Facebook Marketplace locations), and the purpose (obtain coordinates for listing search). It clearly distinguishes from facebook_marketplace_search_list (listing search) and facebook_marketplace_item_get (single item), so an agent can tell it apart without opening schemas.

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?

'To obtain coordinates for listing search' implies it is a prerequisite step before calling the listing search tool, but it never names the alternative sibling (facebook_marketplace_search_list) or states when not to use it. The usage context is implied rather than explicit.

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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