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by com.tldbench
OverviewDiscussionsAdmin

Check and price name ideas

suggest_names
Read-onlyIdempotent

Use this when the user needs name ideas. Pass candidates from your own brainstorm and we check and price them; with only keywords we add simple prefixes, suffixes, TLD hacks and combinations. Returns only names that are available or unknown, cheapest first.

Input Schema

NameRequiredDescriptionDefault
tldsNoextensions to try (default com)
limitNonames to check (each counts against the availability limit; default 20)
yearsNohorizon for totals, 1-10 years (default 3)
currencyNoISO 4217 currency for prices (default USD); converted at the ECB's daily rate, disclosed in `fx`
keywordsNowords to build names from with simple rules (prefixes, suffixes, TLD hacks, pairs)
candidatesNoyour own ideas: labels (brewly) or full names (brewly.co); labels are tried with each of `tlds`
max_lengthNolongest label
max_renew_priceNo
include_resellersNoinclude registrars whose prices are a reseller account's tier (pricing_tier reseller, e.g. eNom); default false
include_limited_promosNocount limited promotions (one per customer, first-time customers only) in totals and rankings; default false: they are listed and flagged promo_limited, but year 1 is priced at the regular price

Output Schema

NameRequiredDescriptionDefault
as_ofYes
notesYes
yearsYes
checkedYes
currencyYesISO 4217
generatedYesnames made from the input before checking
suggestionsYesonly names that are available or unknown: available first, cheapest first

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed3 schema fields changed
    • addedInput schema / properties / include_limited_promos
      Added value: +{
+  "default": false,
+  "description": "count limited promotions (one per customer, first-time customers only) in totals and rankings; default false: they are listed and flagged promo_limited, but year 1 is priced at the regular price",
+  "type": "boolean"
+}
    • addedInput schema / properties / include_resellers
      Added value: +{
+  "default": false,
+  "description": "include registrars whose prices are a reseller account's tier (pricing_tier reseller, e.g. eNom); default false",
+  "type": "boolean"
+}
    • changedOutput schema / properties / suggestions / items / properties / cheapest / anyOf
      Previous value: -[
-  {
-    "description": "The cheapest registrar to own the name for `years` (standard price; a premium name costs more).",
-    "properties": {
-      "first_payment": {
-        "description": "An amount in major units (12.99), in `currency`.",
-        "properties": {
-          "amount": {
-            "type": "number"
-          },
-          "currency": {
-            "description": "ISO 4217",
-            "examples": [
-              "USD"
-            ],
-            "pattern": "^[A-Z]{3}$",
-            "type": "string"
-          }
-        },
-        "required": [
-          "amount",
-          "currency"
-        ],
-        "type": "object"
-      },
-      "min_years": {
-        "anyOf": [
-          {
-            "type": "integer"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "observed_at": {
-        "examples": [
-          "2026-11-06T04:12:00.000Z"
-        ],
-        "format": "date-time",
-        "type": "string"
-      },
-      "promo_first_year": {
-        "type": "boolean"
-      },
-      "register": {
-        "anyOf": [
-          {
-            "description": "An amount in major units (12.99), in `currency`.",
-            "properties": {
-              "amount": {
-                "type": "number"
-              },
-              "currency": {
-                "description": "ISO 4217",
-                "examples": [
-                  "USD"
-                ],
-                "pattern": "^[A-Z]{3}$",
-                "type": "string"
-              }
-            },
-            "required": [
-              "amount",
-              "currency"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "year 1 now (a promotion when one runs)"
-      },
-      "registrar": {
-        "properties": {
-          "id": {
-            "examples": [
-              "porkbun"
-            ],
-            "type": "string"
-          },
-          "name": {
-            "examples": [
-              "Porkbun"
-            ],
-            "type": "string"
-          },
-          "url": {
-            "description": "the registrar's website (a plain link, no affiliate code)",
-            "type": [
-              "string",
-              "null"
-            ]
-          }
-        },
-        "required": [
-          "id",
-          "name",
-          "url"
-        ],
-        "type": "object"
-      },
-      "renew": {
-        "anyOf": [
-          {
-            "description": "An amount in major units (12.99), in `currency`.",
-            "properties": {
-              "amount": {
-                "type": "number"
-              },
-              "currency": {
-                "description": "ISO 4217",
-                "examples": [
-                  "USD"
-                ],
-                "pattern": "^[A-Z]{3}$",
-                "type": "string"
-              }
-            },
-            "required": [
-              "amount",
-              "currency"
-            ],
-            "type": "object"
-          },
-          {
-            "type": "null"
-          }
-        ],
-        "description": "the regular renewal"
-      },
-      "source": {
-        "properties": {
-          "id": {
-            "examples": [
-              "porkbun"
-            ],
-            "type": "string"
-          },
-          "kind": {
-            "description": "api: the registrar's own price API; price_list: a file or JSON the registrar publishes; page: its price page; mirror: a third party's copy of the registrar's prices",
-            "enum": [
-              "api",
-              "price_list",
-              "page",
-              "mirror"
-            ],
-            "type": "string"
-          },
-          "url": {
-            "description": "where the price was read",
-            "type": "string"
-          }
-        },
-        "required": [
-          "id",
-          "kind",
-          "url"
-        ],
-        "type": "object"
-      },
-      "total": {
-        "description": "the cost to own it for `years` (computeTco), the same number as /v1/tlds/{tld}/prices",
-        "properties": {
-          "amount": {
-            "type": "number"
-          },
-          "currency": {
-            "description": "ISO 4217",
-            "examples": [
-              "USD"
-            ],
-            "pattern": "^[A-Z]{3}$",
-            "type": "string"
-          }
-        },
-        "required": [
-          "amount",
-          "currency"
-        ],
-        "type": "object"
-      },
-      "years": {
-        "type": "integer"
-      }
-    },
-    "required": [
-      "registrar",
-      "years",
-      "register",
-      "renew",
-      "first_payment",
-      "total",
-      "min_years",
-      "promo_first_year",
-      "observed_at",
-      "source"
-    ],
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "description": "The cheapest registrar to own the name for `years` (standard price; a premium name costs more).",
+    "properties": {
+      "estimated": {
+        "description": "the total prices a year at the regular renewal because its own regular price is unknown",
+        "type": "boolean"
+      },
+      "first_payment": {
+        "description": "An amount in major units (12.99), in `currency`.",
+        "properties": {
+          "amount": {
+            "type": "number"
+          },
+          "currency": {
+            "description": "ISO 4217",
+            "examples": [
+              "USD"
+            ],
+            "pattern": "^[A-Z]{3}$",
+            "type": "string"
+          }
+        },
+        "required": [
+          "amount",
+          "currency"
+        ],
+        "type": "object"
+      },
+      "min_years": {
+        "anyOf": [
+          {
+            "type": "integer"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "observed_at": {
+        "examples": [
+          "2026-11-06T04:12:00.000Z"
+        ],
+        "format": "date-time",
+        "type": "string"
+      },
+      "promo_first_year": {
+        "type": "boolean"
+      },
+      "register": {
+        "anyOf": [
+          {
+            "description": "An amount in major units (12.99), in `currency`.",
+            "properties": {
+              "amount": {
+                "type": "number"
+              },
+              "currency": {
+                "description": "ISO 4217",
+                "examples": [
+                  "USD"
+                ],
+                "pattern": "^[A-Z]{3}$",
+                "type": "string"
+              }
+            },
+            "required": [
+              "amount",
+              "currency"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "year 1 now (a promotion when one runs)"
+      },
+      "registrar": {
+        "properties": {
+          "id": {
+            "examples": [
+              "porkbun"
+            ],
+            "type": "string"
+          },
+          "name": {
+            "examples": [
+              "Porkbun"
+            ],
+            "type": "string"
+          },
+          "note": {
+            "anyOf": [
+              {
+                "description": "A short, sourced note about the registrar's prices (not a price we rank by).",
+                "properties": {
+                  "checked_on": {
+                    "anyOf": [
+                      {
+                        "examples": [
+                          "2026-11-05"
+                        ],
+                        "format": "date",
+                        "type": "string"
+                      },
+                      {
+                        "type": "null"
+                      }
+                    ]
+                  },
+                  "text": {
+                    "examples": [
+                      "NameSilo's free discount program prices .com at $12.00 (retail $19.99)."
+                    ],
+                    "type": "string"
+                  },
+                  "url": {
+                    "description": "where the note's facts come from",
+                    "type": [
+                      "string",
+                      "null"
+                    ]
+                  }
+                },
+                "required": [
+                  "text",
+                  "url",
+                  "checked_on"
+                ],
+                "type": "object"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "pricing_tier": {
+            "description": "retail: anyone can buy at these prices; reseller: the prices are a reseller account's tier (eNom's Silver), left out of consumer rankings unless include_resellers=true",
+            "enum": [
+              "retail",
+              "reseller"
+            ],
+            "type": "string"
+          },
+          "url": {
+            "description": "the registrar's website (a plain link, no affiliate code)",
+            "type": [
+              "string",
+              "null"
+            ]
+          }
+        },
+        "required": [
+          "id",
+          "name",
+          "url"
+        ],
+        "type": "object"
+      },
+      "renew": {
+        "anyOf": [
+          {
+            "description": "An amount in major units (12.99), in `currency`.",
+            "properties": {
+              "amount": {
+                "type": "number"
+              },
+              "currency": {
+                "description": "ISO 4217",
+                "examples": [
+                  "USD"
+                ],
+                "pattern": "^[A-Z]{3}$",
+                "type": "string"
+              }
+            },
+            "required": [
+              "amount",
+              "currency"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ],
+        "description": "the regular renewal"
+      },
+      "source": {
+        "properties": {
+          "id": {
+            "examples": [
+              "porkbun"
+            ],
+            "type": "string"
+          },
+          "kind": {
+            "description": "api: the registrar's own price API; price_list: a file or JSON the registrar publishes; page: its price page; mirror: a third party's copy of the registrar's prices",
+            "enum": [
+              "api",
+              "price_list",
+              "page",
+              "mirror"
+            ],
+            "type": "string"
+          },
+          "url": {
+            "description": "where the price was read",
+            "type": "string"
+          }
+        },
+        "required": [
+          "id",
+          "kind",
+          "url"
+        ],
+        "type": "object"
+      },
+      "total": {
+        "description": "the cost to own it for `years` (computeTco), the same number as /v1/tlds/{tld}/prices",
+        "properties": {
+          "amount": {
+            "type": "number"
+          },
+          "currency": {
+            "description": "ISO 4217",
+            "examples": [
+              "USD"
+            ],
+            "pattern": "^[A-Z]{3}$",
+            "type": "string"
+          }
+        },
+        "required": [
+          "amount",
+          "currency"
+        ],
+        "type": "object"
+      },
+      "years": {
+        "type": "integer"
+      }
+    },
+    "required": [
+      "registrar",
+      "years",
+      "register",
+      "renew",
+      "first_payment",
+      "total",
+      "min_years",
+      "promo_first_year",
+      "observed_at",
+      "source"
+    ],
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]
  2. First observed

TDQS

A4.2/5.0
Behavior4/5

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

Annotations already declare readOnly/ idempotent/ non-destructive, so the bar is lower. The description still adds real behavior: only available or unknown names are returned, sorted cheapest first, and keyword mode uses prefixes, suffixes, TLD hacks and combinations. It omits that check counts consume an availability quota, a limit noted only in the schema.

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?

Three sentences, front-loaded with the use condition, then the two input modes, then the output contract. No filler and no repetition of schema content.

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?

With an output schema and full annotations present, the description covers the remaining gaps an agent needs: mode selection and result filtering/ordering. The one edge case left implicit is what happens when no parameters are supplied, since nothing is required.

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 90% so the baseline is 3, and the description earns above that by explaining the interaction between candidates and tlds (labels are tried against each extension) and how keywords differ. It adds no detail on currency, years, max_renew_price or the reseller/promo flags, which remain schema-only.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a concrete action: validating and pricing name ideas, with two distinct input modes (candidates vs keywords). It is clear what the tool does, though it does not explicitly contrast itself with siblings like check_availability or search_name_across_tlds, which an agent must infer.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives a clear triggering condition ('when the user needs name ideas') and explains which mode to use: pass candidates from your own brainstorm, or keywords alone for rule-based generation. It stops short of exclusions, e.g. telling the agent to use check_availability for a single already-chosen name.

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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