signals

investors

Read-only

Search and filter investor records by keyword, type, HQ country, or exact domain. Costs one credit per returned record.

Input Schema

TableJSON Schema

Name	Required	Description
`type`	No	Investor type filters. Canonical values: vc, angel, cvc, pe, growth, accelerator, family_office, syndicate, unknown.
`limit`	No	Maximum records to return (1-100). Each returned record costs one credit.
`since`	No	Return investors created/updated on or after this date (YYYY-MM-DD) or ISO-8601 timestamp.
`cursor`	No	Opaque pagination cursor returned as pagination.nextCursor on the previous page.
`domain`	No	Exact investor domain.
`search`	No	Keyword search over investor name and domain.
`countries`	No	Headquarters country codes (ISO alpha-2, OR). Pass "unknown" to include companies with no country on file.
`investsIn`	No	Only investors that have funded companies headquartered in these countries (OR), e.g. ["US"]. Filters on where an investor deploys rather than where it is registered, and is far better covered than HQ country.
`minRounds`	No	Only investors that have participated in at least this many rounds.
`activeSince`	No	Only investors whose most recent round was announced on or after this date (YYYY-MM-DD).
`minRoundUsd`	No	Only investors that have participated in at least one round at or above this amount, in whole USD. Filters on behaviour rather than on a type label, which is sparse.
`hasFirmographics`	No	Only investors whose domain and type we have resolved.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedAug 27, 2026

changedInput schema / properties / countries / items / enum

Previous value: -[
-  "unknown",
-  "AD",
-  "AE",
-  "AF",
-  "AG",
-  "AL",
-  "AM",
-  "AO",
-  "AR",
-  "AT",
-  "AU",
-  "AZ",
-  "BA",
-  "BB",
-  "BD",
-  "BE",
-  "BF",
-  "BG",
-  "BH",
-  "BI",
-  "BJ",
-  "BM",
-  "BN",
-  "BO",
-  "BR",
-  "BS",
-  "BT",
-  "BW",
-  "BY",
-  "BZ",
-  "CA",
-  "CD",
-  "CF",
-  "CG",
-  "CH",
-  "CI",
-  "CL",
-  "CM",
-  "CN",
-  "CO",
-  "CR",
-  "CU",
-  "CV",
-  "CY",
-  "CZ",
-  "DE",
-  "DJ",
-  "DK",
-  "DM",
-  "DO",
-  "DZ",
-  "EC",
-  "EE",
-  "EG",
-  "ER",
-  "ES",
-  "ET",
-  "FI",
-  "FJ",
-  "FM",
-  "FR",
-  "GA",
-  "GB",
-  "GD",
-  "GE",
-  "GG",
-  "GH",
-  "GI",
-  "GM",
-  "GN",
-  "GQ",
-  "GR",
-  "GT",
-  "GW",
-  "GY",
-  "HK",
-  "HN",
-  "HR",
-  "HT",
-  "HU",
-  "ID",
-  "IE",
-  "IL",
-  "IM",
-  "IN",
-  "IQ",
-  "IR",
-  "IS",
-  "IT",
-  "JE",
-  "JM",
-  "JO",
-  "JP",
-  "KE",
-  "KG",
-  "KH",
-  "KI",
-  "KM",
-  "KN",
-  "KP",
-  "KR",
-  "KW",
-  "KY",
-  "KZ",
-  "LA",
-  "LB",
-  "LC",
-  "LI",
-  "LK",
-  "LR",
-  "LS",
-  "LT",
-  "LU",
-  "LV",
-  "LY",
-  "MA",
-  "MC",
-  "MD",
-  "ME",
-  "MG",
-  "MH",
-  "MK",
-  "ML",
-  "MM",
-  "MN",
-  "MO",
-  "MR",
-  "MT",
-  "MU",
-  "MV",
-  "MW",
-  "MX",
-  "MY",
-  "MZ",
-  "NA",
-  "NE",
-  "NG",
-  "NI",
-  "NL",
-  "NO",
-  "NP",
-  "NR",
-  "NZ",
-  "OM",
-  "PA",
-  "PG",
-  "PH",
-  "PK",
-  "PL",
-  "PR",
-  "PS",
-  "PT",
-  "PW",
-  "PY",
-  "QA",
-  "RO",
-  "RS",
-  "RU",
-  "RW",
-  "SA",
-  "SB",
-  "SC",
-  "SD",
-  "SE",
-  "SG",
-  "SI",
-  "SK",
-  "SL",
-  "SM",
-  "SN",
-  "SO",
-  "SR",
-  "SS",
-  "ST",
-  "SV",
-  "SY",
-  "SZ",
-  "TD",
-  "TG",
-  "TH",
-  "TJ",
-  "TL",
-  "TM",
-  "TN",
-  "TO",
-  "TR",
-  "TT",
-  "TV",
-  "TW",
-  "TZ",
-  "UA",
-  "UG",
-  "US",
-  "UY",
-  "UZ",
-  "VA",
-  "VC",
-  "VE",
-  "VG",
-  "VN",
-  "VU",
-  "WS",
-  "YE",
-  "ZA",
-  "ZM",
-  "ZW"
-]New value: +[
+  "unknown",
+  "AD",
+  "AE",
+  "AF",
+  "AG",
+  "AI",
+  "AL",
+  "AM",
+  "AO",
+  "AR",
+  "AS",
+  "AT",
+  "AU",
+  "AW",
+  "AX",
+  "AZ",
+  "BA",
+  "BB",
+  "BD",
+  "BE",
+  "BF",
+  "BG",
+  "BH",
+  "BI",
+  "BJ",
+  "BL",
+  "BM",
+  "BN",
+  "BO",
+  "BQ",
+  "BR",
+  "BS",
+  "BT",
+  "BW",
+  "BY",
+  "BZ",
+  "CA",
+  "CD",
+  "CF",
+  "CG",
+  "CH",
+  "CI",
+  "CK",
+  "CL",
+  "CM",
+  "CN",
+  "CO",
+  "CR",
+  "CU",
+  "CV",
+  "CW",
+  "CY",
+  "CZ",
+  "DE",
+  "DJ",
+  "DK",
+  "DM",
+  "DO",
+  "DZ",
+  "EC",
+  "EE",
+  "EG",
+  "EH",
+  "ER",
+  "ES",
+  "ET",
+  "FI",
+  "FJ",
+  "FK",
+  "FM",
+  "FO",
+  "FR",
+  "GA",
+  "GB",
+  "GD",
+  "GE",
+  "GF",
+  "GG",
+  "GH",
+  "GI",
+  "GL",
+  "GM",
+  "GN",
+  "GP",
+  "GQ",
+  "GR",
+  "GT",
+  "GU",
+  "GW",
+  "GY",
+  "HK",
+  "HN",
+  "HR",
+  "HT",
+  "HU",
+  "ID",
+  "IE",
+  "IL",
+  "IM",
+  "IN",
+  "IQ",
+  "IR",
+  "IS",
+  "IT",
+  "JE",
+  "JM",
+  "JO",
+  "JP",
+  "KE",
+  "KG",
+  "KH",
+  "KI",
+  "KM",
+  "KN",
+  "KP",
+  "KR",
+  "KW",
+  "KY",
+  "KZ",
+  "LA",
+  "LB",
+  "LC",
+  "LI",
+  "LK",
+  "LR",
+  "LS",
+  "LT",
+  "LU",
+  "LV",
+  "LY",
+  "MA",
+  "MC",
+  "MD",
+  "ME",
+  "MF",
+  "MG",
+  "MH",
+  "MK",
+  "ML",
+  "MM",
+  "MN",
+  "MO",
+  "MP",
+  "MQ",
+  "MR",
+  "MS",
+  "MT",
+  "MU",
+  "MV",
+  "MW",
+  "MX",
+  "MY",
+  "MZ",
+  "NA",
+  "NC",
+  "NE",
+  "NG",
+  "NI",
+  "NL",
+  "NO",
+  "NP",
+  "NR",
+  "NU",
+  "NZ",
+  "OM",
+  "PA",
+  "PE",
+  "PF",
+  "PG",
+  "PH",
+  "PK",
+  "PL",
+  "PM",
+  "PR",
+  "PS",
+  "PT",
+  "PW",
+  "PY",
+  "QA",
+  "RE",
+  "RO",
+  "RS",
+  "RU",
+  "RW",
+  "SA",
+  "SB",
+  "SC",
+  "SD",
+  "SE",
+  "SG",
+  "SH",
+  "SI",
+  "SK",
+  "SL",
+  "SM",
+  "SN",
+  "SO",
+  "SR",
+  "SS",
+  "ST",
+  "SV",
+  "SX",
+  "SY",
+  "SZ",
+  "TC",
+  "TD",
+  "TG",
+  "TH",
+  "TJ",
+  "TK",
+  "TL",
+  "TM",
+  "TN",
+  "TO",
+  "TR",
+  "TT",
+  "TV",
+  "TW",
+  "TZ",
+  "UA",
+  "UG",
+  "US",
+  "UY",
+  "UZ",
+  "VA",
+  "VC",
+  "VE",
+  "VG",
+  "VI",
+  "VN",
+  "VU",
+  "WF",
+  "WS",
+  "YE",
+  "YT",
+  "ZA",
+  "ZM",
+  "ZW"
+]

addedInput schema / properties / investsIn

Added value: +{
+  "description": "Only investors that have funded companies headquartered in these countries (OR), e.g. [\"US\"]. Filters on where an investor deploys rather than where it is registered, and is far better covered than HQ country.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

Changed3 schema fields changedAug 27, 2026

addedInput schema / properties / activeSince

Added value: +{
+  "description": "Only investors whose most recent round was announced on or after this date (YYYY-MM-DD).",
+  "type": "string"
+}

addedInput schema / properties / minRoundUsd

Added value: +{
+  "description": "Only investors that have participated in at least one round at or above this amount, in whole USD. Filters on behaviour rather than on a type label, which is sparse.",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

addedInput schema / properties / minRounds

Added value: +{
+  "description": "Only investors that have participated in at least this many rounds.",
+  "maximum": 9007199254740991,
+  "minimum": 1,
+  "type": "integer"
+}

Changed1 schema field changedAug 26, 2026

addedInput schema / properties / countries / items / enum

Added value: +[
+  "unknown",
+  "AD",
+  "AE",
+  "AF",
+  "AG",
+  "AL",
+  "AM",
+  "AO",
+  "AR",
+  "AT",
+  "AU",
+  "AZ",
+  "BA",
+  "BB",
+  "BD",
+  "BE",
+  "BF",
+  "BG",
+  "BH",
+  "BI",
+  "BJ",
+  "BM",
+  "BN",
+  "BO",
+  "BR",
+  "BS",
+  "BT",
+  "BW",
+  "BY",
+  "BZ",
+  "CA",
+  "CD",
+  "CF",
+  "CG",
+  "CH",
+  "CI",
+  "CL",
+  "CM",
+  "CN",
+  "CO",
+  "CR",
+  "CU",
+  "CV",
+  "CY",
+  "CZ",
+  "DE",
+  "DJ",
+  "DK",
+  "DM",
+  "DO",
+  "DZ",
+  "EC",
+  "EE",
+  "EG",
+  "ER",
+  "ES",
+  "ET",
+  "FI",
+  "FJ",
+  "FM",
+  "FR",
+  "GA",
+  "GB",
+  "GD",
+  "GE",
+  "GG",
+  "GH",
+  "GI",
+  "GM",
+  "GN",
+  "GQ",
+  "GR",
+  "GT",
+  "GW",
+  "GY",
+  "HK",
+  "HN",
+  "HR",
+  "HT",
+  "HU",
+  "ID",
+  "IE",
+  "IL",
+  "IM",
+  "IN",
+  "IQ",
+  "IR",
+  "IS",
+  "IT",
+  "JE",
+  "JM",
+  "JO",
+  "JP",
+  "KE",
+  "KG",
+  "KH",
+  "KI",
+  "KM",
+  "KN",
+  "KP",
+  "KR",
+  "KW",
+  "KY",
+  "KZ",
+  "LA",
+  "LB",
+  "LC",
+  "LI",
+  "LK",
+  "LR",
+  "LS",
+  "LT",
+  "LU",
+  "LV",
+  "LY",
+  "MA",
+  "MC",
+  "MD",
+  "ME",
+  "MG",
+  "MH",
+  "MK",
+  "ML",
+  "MM",
+  "MN",
+  "MO",
+  "MR",
+  "MT",
+  "MU",
+  "MV",
+  "MW",
+  "MX",
+  "MY",
+  "MZ",
+  "NA",
+  "NE",
+  "NG",
+  "NI",
+  "NL",
+  "NO",
+  "NP",
+  "NR",
+  "NZ",
+  "OM",
+  "PA",
+  "PG",
+  "PH",
+  "PK",
+  "PL",
+  "PR",
+  "PS",
+  "PT",
+  "PW",
+  "PY",
+  "QA",
+  "RO",
+  "RS",
+  "RU",
+  "RW",
+  "SA",
+  "SB",
+  "SC",
+  "SD",
+  "SE",
+  "SG",
+  "SI",
+  "SK",
+  "SL",
+  "SM",
+  "SN",
+  "SO",
+  "SR",
+  "SS",
+  "ST",
+  "SV",
+  "SY",
+  "SZ",
+  "TD",
+  "TG",
+  "TH",
+  "TJ",
+  "TL",
+  "TM",
+  "TN",
+  "TO",
+  "TR",
+  "TT",
+  "TV",
+  "TW",
+  "TZ",
+  "UA",
+  "UG",
+  "US",
+  "UY",
+  "UZ",
+  "VA",
+  "VC",
+  "VE",
+  "VG",
+  "VN",
+  "VU",
+  "WS",
+  "YE",
+  "ZA",
+  "ZM",
+  "ZW"
+]

Changed3 schema fields changedAug 26, 2026

addedInput schema / properties / countries

Added value: +{
+  "description": "Headquarters country codes (ISO alpha-2, OR). Pass \"unknown\" to include companies with no country on file.",
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

removedInput schema / properties / country

Removed value: -{
-  "description": "Headquarters country code (ISO alpha-2).",
-  "type": "string"
-}

addedInput schema / properties / hasFirmographics

Added value: +{
+  "description": "Only investors whose domain and type we have resolved.",
+  "type": "boolean"
+}

Changed1 schema field changedJul 4, 2026

changedInput schema / properties / since / description

Previous value: -"Return investors created/updated after this ISO-8601 timestamp."New value: +"Return investors created/updated on or after this date (YYYY-MM-DD) or ISO-8601 timestamp."

First observedJun 28, 2026

TDQS

A3.9/5.0

Behavior4/5

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

Annotations already mark this as read-only and non-destructive; the description reinforces that with 'Search and filter' and adds a useful economic constraint: 'Costs one credit per returned record.' This credit cost is material behavioral information beyond what annotations provide, though pagination and result format are not disclosed.

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 short sentences with the core action and filters first, followed by the cost warning. No filler, no redundancy with the schema, and every sentence 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 description gives the essential purpose and cost, and the schema covers all inputs, but with 12 optional filters, no output schema, and no pagination or return-format note, an agent may not know the full breadth of filters (e.g., investsIn, minRounds, activeSince) or what a returned record contains. Adequate but with clear gaps.

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?

All 12 parameters are fully described in the schema (100% coverage), so the description is not required to repeat them. It echoes the main filters (type, countries, domain, search) and adds the credit-cost nuance on limit, but adds no new semantics beyond the schema. Baseline 3 applies.

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 uses the action verbs 'Search and filter' on 'investor records' and names the key dimensions (keyword, type, HQ country, exact domain), making it clear what resource this tool operates on. This distinguishes it from resource-specific siblings like companies, funding_events, or acquisitions.

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 by naming the resource and filter dimensions, but it does not explicitly state when to prefer this tool over alternatives or when not to use it. There are no exclusions or references to sibling tools, so the agent must infer that investor-record queries go here.

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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