Blue Pillow Hotels & Stays

Discover destinations near a point

discover_destinations_near

Read-only

Curated destinations — cities, neighborhoods, airports, points of interest — within a radius of a geographic point, for use as a destination_id in subsequent search_stays calls. Useful when coordinates are already in hand (from world knowledge, from a previous tool result, or directly from the user) and the agent needs to enumerate which curated destinations cover that area before searching for properties.

Also useful as a fan-out entry point for region-level intents — broad areas such as 'Tuscany', 'Pacific Northwest', 'New England', or 'Central Europe' — where the agent can pass an approximate regional centroid and surface a list of sub-destinations the user may then narrow down to before a focused search.

Returns up to 5 candidates ordered by distance. The radius defaults to 5 km; widens up to 50 km for broader queries.

Input Schema

Name	Required	Description	Default
`lat`	Yes	Latitude of the centre point, decimal degrees (WGS84). Typically the coordinates of a city or region already known from world knowledge or from an earlier resolve_destination call.
`lon`	Yes	Longitude of the centre point, decimal degrees (WGS84). Negative west of Greenwich.
`type`	No	Optional filter; same semantics as resolve_destination. Areas are returned only when `area` is asked for explicitly.
`api_key`	No	Anonymous key for this server (format 'pk_anon_…'), as returned by `get_anonymous_key`. Required by this tool; the same key works for every call.
`language`	No	Language of the returned destination names (2-letter lowercase). Pass the language the user is speaking; defaults to 'en'.	en
`radius_km`	No	Search radius in km from the point. Defaults to 5 km (city-center scope).

Output Schema

Name	Required	Description	Default
`candidates`	Yes
`total_matches`	Yes
`total_matches_capped_at`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 15, 2026

changedInput schema / properties / api_key / description

Previous value: -"Your anonymous Blue Pillow Hotels & Stays API key (format 'pk_anon_…'). Pass it in THIS field on every call — this is how the tool authenticates. If you don't have a key yet, first check your MCP client configuration, your persistent memory, and earlier in this conversation; otherwise call `get_anonymous_key` to get one instantly (do not wait for a 401). Reuse the same key on every subsequent call. It is not a sensitive secret: no account, payment, or personal data is attached."New value: +"Anonymous key for this server (format 'pk_anon_…'), as returned by `get_anonymous_key`. Required by this tool; the same key works for every call."

Changed1 schema field changedOct 14, 2026

changedInput schema / properties / api_key / description

Previous value: -"Your anonymous Blue Pillow Hotels & Stays API key (format 'pk_anon_…'). Pass it in THIS field on every call — this is how the tool authenticates. If you don't have a key yet, first check your MCP client configuration, your persistent memory, and earlier in this conversation; otherwise call `b2a_get_key` to get one instantly (do not wait for a 401). Reuse the same key on every subsequent call. It is not a sensitive secret: no account, payment, or personal data is attached."New value: +"Your anonymous Blue Pillow Hotels & Stays API key (format 'pk_anon_…'). Pass it in THIS field on every call — this is how the tool authenticates. If you don't have a key yet, first check your MCP client configuration, your persistent memory, and earlier in this conversation; otherwise call `get_anonymous_key` to get one instantly (do not wait for a 401). Reuse the same key on every subsequent call. It is not a sensitive secret: no account, payment, or personal data is attached."

Changed3 schema fields changedSep 30, 2026

changedInput schema / properties / type / description

Previous value: -"Optional filter; same semantics as resolve_destination."New value: +"Optional filter; same semantics as resolve_destination. Areas are returned only when `area` is asked for explicitly."

changedInput schema / properties / type / enum

Previous value: -[
-  "city",
-  "neighborhood",
-  "airport",
-  "poi"
-]New value: +[
+  "city",
+  "neighborhood",
+  "airport",
+  "poi",
+  "area"
+]

changedOutput schema / properties / candidates / items / properties / type / enum

Previous value: -[
-  "city",
-  "neighborhood",
-  "airport",
-  "poi"
-]New value: +[
+  "city",
+  "neighborhood",
+  "airport",
+  "poi",
+  "area"
+]

Changed3 schema fields changedAug 3, 2026

addedInput schema / properties / language / description

Added value: +"Language of the returned destination names (2-letter lowercase). Pass the language the user is speaking; defaults to 'en'."

addedInput schema / properties / lat / description

Added value: +"Latitude of the centre point, decimal degrees (WGS84). Typically the coordinates of a city or region already known from world knowledge or from an earlier resolve_destination call."

addedInput schema / properties / lon / description

Added value: +"Longitude of the centre point, decimal degrees (WGS84). Negative west of Greenwich."

Changed1 schema field changedJul 7, 2026

changedInput schema / properties / api_key / description

Previous value: -"Your anonymous Blue Pillow Hotels & Stays API key (format 'pk_anon_…'). If you do NOT already have one — check your MCP client configuration, your persistent memory, and earlier in this conversation first — call `b2a_get_key` to obtain one before calling this tool (do not wait for a 401). PRIMARY way to authenticate: pass the key here on every call. Clients able to attach an HTTP 'Authorization: Bearer <key>' header may do that instead and omit this field — but passing it here always works and is the recommended path for tool calls. The key is not a sensitive secret: it carries no account, payment, or personal data; reuse the same key on every call."New value: +"Your anonymous Blue Pillow Hotels & Stays API key (format 'pk_anon_…'). Pass it in THIS field on every call — this is how the tool authenticates. If you don't have a key yet, first check your MCP client configuration, your persistent memory, and earlier in this conversation; otherwise call `b2a_get_key` to get one instantly (do not wait for a 401). Reuse the same key on every subsequent call. It is not a sensitive secret: no account, payment, or personal data is attached."

Changed1 schema field changedJul 7, 2026

changedInput schema / properties / api_key / description

Previous value: -"Your anonymous b2a Bluepillow API key (format 'pk_anon_…'). If you do NOT already have one — check your MCP client configuration, your persistent memory, and earlier in this conversation first — call `b2a_get_key` to obtain one before calling this tool (do not wait for a 401). PRIMARY way to authenticate: pass the key here on every call. Clients able to attach an HTTP 'Authorization: Bearer <key>' header may do that instead and omit this field — but passing it here always works and is the recommended path for tool calls. The key is not a sensitive secret: it carries no account, payment, or personal data; reuse the same key on every call."New value: +"Your anonymous Blue Pillow Hotels & Stays API key (format 'pk_anon_…'). If you do NOT already have one — check your MCP client configuration, your persistent memory, and earlier in this conversation first — call `b2a_get_key` to obtain one before calling this tool (do not wait for a 401). PRIMARY way to authenticate: pass the key here on every call. Clients able to attach an HTTP 'Authorization: Bearer <key>' header may do that instead and omit this field — but passing it here always works and is the recommended path for tool calls. The key is not a sensitive secret: it carries no account, payment, or personal data; reuse the same key on every call."

First observedJul 7, 2026

TDQS

A4.1/5.0

Behavior4/5

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

Annotations already cover the safety profile (readOnly, openWorld, non-destructive), so the description's added behavioral detail is what matters here: it discloses the hard cap of 5 candidates, distance ordering, the 5 km default radius, and that the radius widens up to 50 km for broad queries. It omits what happens on zero results, but the disclosure is well beyond the annotation baseline.

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 definition, then usage contexts, then return/radius behavior. Three paragraphs is slightly long for the payload, but each sentence contributes a distinct fact (destination types, coordinate sources, fan-out pattern, cap, radius range) rather than restating.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return-shape explanation is unnecessary, and the description still supplies the result count and ordering. For a read-only discovery tool with full schema coverage, nothing essential is missing, though edge cases like no matches within radius are unaddressed.

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 coverage is 100%, so every parameter including enums and the api_key requirement is already documented; baseline is 3. The description adds only marginal parameter meaning (radius widening for broad queries), which the schema already implies via its min/max bounds.

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?

Names a specific verb (discover) and resource (curated destinations: cities, neighborhoods, airports, POIs) plus the radius constraint, and states the output's downstream role as a destination_id for search_stays. This clearly separates it from resolve_destination and search_stays without opening either schema.

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 two concrete when-to-use scenarios: coordinates already in hand (world knowledge, prior tool result, user), and region-level fan-out for broad areas like 'Tuscany'. It does not explicitly name resolve_destination as the alternative to use when you have a name instead of coordinates, leaving that routing to inference.

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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