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openstreetmap-mcp-server

Find OSM features near a point

openstreetmap_query_nearby
Read-onlyIdempotent

Find OSM features within a radius of a point via the Overpass API, the tool for "what is near X?" questions. Filter with amenity, or with tag_key plus an optional tag_value, ANDing up to five more filters; every feature returns with its full OSM tag set (no extratags flag here), sorted nearest-first by distance_meters. An area containing the point, such as the park or city it lies in, matches at 0 m whatever the radius.

Input Schema

NameRequiredDescriptionDefault
latYesCenter latitude in WGS84 decimal degrees.
lonYesCenter longitude in WGS84 decimal degrees.
limitNoMaximum results to return, up to 500 per call; a larger value is served as 500 and limitNotice says so. Applied after the Overpass query — if the area has more features, they are truncated.
offsetNoNumber of matching features to skip before applying limit, for paging through a large result set. Features are distance-sorted before paging, so higher offsets return progressively farther matches; the full set is cached ~10 minutes so re-paging costs no extra upstream request. Pass the nextOffset value from a prior truncated response.
amenityNoOSM amenity tag value (e.g. "hospital", "pharmacy", "restaurant", "atm"), shortcut for tag_key="amenity". Exactly one primary mode is required: this or tag_key, never both. Many categories live under other keys — tourism (museums, hotels, viewpoints), leisure (parks, pitches, playgrounds), shop (supermarkets), historic (castles, memorials), natural (beaches, peaks); query those with tag_key and tag_value.
filtersNoUp to five additional filters, ANDed with the required primary amenity or tag_key filter in input order. Omitted or [] adds no conditions. Exact values miss semicolon-list values; set match "list_item" on the entry. Keys must be unique after trimming; keys and values must not contain Overpass QL metacharacters (" \ [ ] ; ( )).
tag_keyNoPrimary OSM tag key (e.g. "leisure", "shop", "highway"); omit tag_value to match any feature carrying the key, or supply it for exact equality. The alternative to amenity, never both. Additional filters are ANDed with this tag.
tag_valueNoLiteral value paired with tag_key for exact equality (e.g., "park", "supermarket"); omit for key existence. Exact equality misses semicolon-list values (cuisine=pizza;italian); tag_value_match "list_item" catches them. Explicit empty or whitespace-only values are invalid. Keys and values are trimmed; blank unused fields are ignored in amenity mode.
element_typesNoOSM element types to search, at least one. Nodes cover most standalone POIs, ways most buildings and areas, relations large parks, lakes, campuses, and boundaries. Omit the field to search all three; pass ["node", "way"] to leave relations out. An empty array is rejected because it can only match nothing.
radius_metersNoSearch radius in meters. Max 50,000m (50km). Keep under 5,000m for dense urban POI queries to avoid slow responses.
tag_value_matchNoHow tag_value matches: "exact" (default) compares the whole value; "list_item" matches one item of a semicolon list, so "pizza" finds cuisine=pizza;italian. Needs tag_value; not available with amenity.
timeout_secondsNoOverpass query timeout in seconds. Increase for large radius or dense areas.

Output Schema

NameRequiredDescriptionDefault
errorNoPresent when the call failed. Absent on success.
noticeNoWhy this page is empty and what to try: nothing matched (widen the radius or change the tag), or offset ran past the end (retry lower). On any page, also names the key to retry with when amenity names a value OpenStreetMap tags under another key (tourism=museum, not amenity=museum), and says when distances were measured to bounding-box centers or areas containing the point went unchecked. Absent otherwise.
elementsNoMatching OSM features, up to the limit.
truncatedNoTrue if results were cut at the limit. Reduce radius, add more specific tags, or page with offset to retrieve the rest.
nextOffsetNoOffset to pass on the next call to retrieve the following page of features. Present only when more features remain beyond this page.
totalFoundNoTotal features returned by Overpass before limit truncation.
attributionNoRequired data attribution: Data © OpenStreetMap contributors, ODbL 1.0.
limitNoticeNoPresent when limit exceeded this tool's maximum: the value requested and the one applied.
effectiveTagNoThe full ordered AND filter chain: key=value for equality, key∋value for a list-item match, key alone for existence (e.g. "amenity=restaurant, cuisine∋pizza, name").
areasTimestampNoFreshness of the Overpass area database that found the relations containing the point, rebuilt on its own schedule and so lagging data_timestamp. Present only when ways or relations were searched and the endpoint ran that check.
data_timestampNoOSM data freshness timestamp from the Overpass response. Absent when the endpoint reported no freshness metadata.
servingEndpointNoOverpass endpoint that answered, named by origin alone (scheme, host, port), with "(entry N)" added when two configured endpoints share an origin. May name a failover mirror, or the endpoint that originally served a cached response. Read with data_timestamp when a result looks slow, sparse, or stale.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed4 schema fields changed
    • changedInput schema / properties / element_types / default
      Previous value: -[
      -  "node",
      -  "way"
      -]New value: +[
      +  "node",
      +  "way",
      +  "relation"
      +]
    • changedInput schema / properties / element_types / description
      Previous value: -"OSM element types to search, at least one. Ways cover most buildings and areas; nodes cover most standalone POIs. Add \"relation\" for complex structures like large campuses. Omit the field to search nodes and ways; an empty array is rejected because it can only match nothing."New value: +"OSM element types to search, at least one. Nodes cover most standalone POIs, ways most buildings and areas, relations large parks, lakes, campuses, and boundaries. Omit the field to search all three; pass [\"node\", \"way\"] to leave relations out. An empty array is rejected because it can only match nothing."
    • addedOutput schema / properties / areasTimestamp
      Added value: +{
      +  "description": "Freshness of the Overpass area database that found the relations containing the point, rebuilt on its own schedule and so lagging data_timestamp. Present only when ways or relations were searched and the endpoint ran that check.",
      +  "type": "string"
      +}
    • changedOutput schema / properties / notice / description
      Previous value: -"Why this page is empty and what to try: nothing matched (widen the radius or change the tag), or offset ran past the end (retry lower). On any page, also names the key to retry with when amenity names a value OpenStreetMap tags under another key (tourism=museum, not amenity=museum), and says when distances were measured to bounding-box centers. Absent otherwise."New value: +"Why this page is empty and what to try: nothing matched (widen the radius or change the tag), or offset ran past the end (retry lower). On any page, also names the key to retry with when amenity names a value OpenStreetMap tags under another key (tourism=museum, not amenity=museum), and says when distances were measured to bounding-box centers or areas containing the point went unchecked. Absent otherwise."
  2. Changed1 schema field changed
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, a list_item match has no value, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query, or its response passed the server's 64 MiB read ceiling. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 or 408 with no busy-dispatcher remark — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 501 and 504, a 425, or a 504 or 408 whose remark says its dispatcher is too busy or turned off — the endpoint is down, restarting, shedding load, or not taking the query yet. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, HTTP refusals such as 401/403/404, throttling, or instance faults, in some mix. `endpoints_rejected`: Every configured endpoint refused the call by HTTP status: a 401, 403, 404, or 501, a redirect, or another non-retried status below 500 other than 400 and 429. `pacer_shed`: The query waited 30 seconds in total for an Overpass slot while other calls held every slot it could take. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, a list_item match has no value, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query, or its response passed the server's 64 MiB read ceiling. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 or 408 with no busy-dispatcher remark — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 501 and 504, a 425, or a 504 or 408 whose remark says its dispatcher is too busy or turned off — the endpoint is down, restarting, shedding load, or not taking the query yet. `endpoints_exhausted`: No endpoint completed within its attempt window, or the total budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, HTTP refusals such as 401/403/404, throttling, or instance faults, in some mix. `endpoints_rejected`: Every configured endpoint refused the call by HTTP status: a 401, 403, 404, or 501, a redirect, or another non-retried status below 500 other than 400 and 429. `pacer_shed`: The query waited 30 seconds in total for an Overpass slot while other calls held every slot it could take. Other values are possible when a failure originates below the handler."
  3. Changed16 schema fields changed
    • changedInput schema / properties / amenity / description
      Previous value: -"OSM amenity tag value (e.g. \"hospital\", \"pharmacy\", \"restaurant\", \"atm\"), shortcut for tag_key=\"amenity\". Exactly one primary mode is required: this or tag_key, never both."New value: +"OSM amenity tag value (e.g. \"hospital\", \"pharmacy\", \"restaurant\", \"atm\"), shortcut for tag_key=\"amenity\". Exactly one primary mode is required: this or tag_key, never both. Many categories live under other keys — tourism (museums, hotels, viewpoints), leisure (parks, pitches, playgrounds), shop (supermarkets), historic (castles, memorials), natural (beaches, peaks); query those with tag_key and tag_value."
    • changedInput schema / properties / filters / description
      Previous value: -"Up to five additional filters, ANDed with the required primary amenity or tag_key filter in input order. Omitted or [] adds no conditions. Keys must be unique after trimming; keys and values must not contain Overpass QL metacharacters (\" \\ [ ] ; ( ))."New value: +"Up to five additional filters, ANDed with the required primary amenity or tag_key filter in input order. Omitted or [] adds no conditions. Exact values miss semicolon-list values; set match \"list_item\" on the entry. Keys must be unique after trimming; keys and values must not contain Overpass QL metacharacters (\" \\ [ ] ; ( ))."
    • changedInput schema / properties / filters / items / description
      Previous value: -"One additional literal equality or key-existence filter."New value: +"One additional equality, list-item, or key-existence filter."
    • addedInput schema / properties / filters / items / properties / match
      Added value: +{
      +  "description": "How value matches: \"exact\" (default) or \"list_item\", one item of a semicolon list. Needs value.",
      +  "enum": [
      +    "exact",
      +    "list_item"
      +  ],
      +  "type": "string"
      +}
    • changedInput schema / properties / filters / items / properties / value / description
      Previous value: -"Literal exact-match value. Omit for key existence; an explicitly blank value is invalid. Trimmed before matching."New value: +"Literal value to match. Omit for key existence; an explicitly blank value is invalid. Trimmed before matching."
    • changedInput schema / properties / limit / description
      Previous value: -"Maximum results to return. Applied after the Overpass query — if the area has more features, they are truncated."New value: +"Maximum results to return, up to 500 per call; a larger value is served as 500 and limitNotice says so. Applied after the Overpass query — if the area has more features, they are truncated."
    • changedInput schema / properties / limit / maximum
      Previous value: -500New value: +10000
    • changedInput schema / properties / tag_value / description
      Previous value: -"Literal value paired with tag_key for exact equality (e.g., \"park\", \"supermarket\"); omit for key existence. Explicit empty or whitespace-only values are invalid. Keys and values are trimmed; blank unused fields are ignored in amenity mode."New value: +"Literal value paired with tag_key for exact equality (e.g., \"park\", \"supermarket\"); omit for key existence. Exact equality misses semicolon-list values (cuisine=pizza;italian); tag_value_match \"list_item\" catches them. Explicit empty or whitespace-only values are invalid. Keys and values are trimmed; blank unused fields are ignored in amenity mode."
    • addedInput schema / properties / tag_value_match
      Added value: +{
      +  "description": "How tag_value matches: \"exact\" (default) compares the whole value; \"list_item\" matches one item of a semicolon list, so \"pizza\" finds cuisine=pizza;italian. Needs tag_value; not available with amenity.",
      +  "enum": [
      +    "exact",
      +    "list_item"
      +  ],
      +  "type": "string"
      +}
    • changedOutput schema / properties / effectiveTag / description
      Previous value: -"The full ordered AND filter chain: key=value for equality, key alone for existence (e.g. \"amenity=restaurant, cuisine=italian, name\")."New value: +"The full ordered AND filter chain: key=value for equality, key∋value for a list-item match, key alone for existence (e.g. \"amenity=restaurant, cuisine∋pizza, name\")."
    • changedOutput schema / properties / elements / items / properties / distance_meters / description
      Previous value: -"Great-circle distance in meters from the query center, rounded to one decimal. Results are sorted ascending by this value; omitted for elements without a computed coordinate."New value: +"Great-circle distance in meters from the query center to the feature's nearest point, rounded to one decimal: 0 inside an area (a closed way, a multipolygon or boundary relation), never 0 for a route; to a way's or relation's bounding-box center when notice says so. Results are sorted ascending by it; omitted for a way or relation that arrived without geometry."
    • changedOutput schema / properties / elements / items / properties / lat / description
      Previous value: -"Latitude (present for nodes and ways/relations with computed center)."New value: +"Latitude: a node's own, or the center of a way's or relation's bounding box."
    • changedOutput schema / properties / elements / items / properties / lon / description
      Previous value: -"Longitude (present for nodes and ways/relations with computed center)."New value: +"Longitude: a node's own, or the center of a way's or relation's bounding box."
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 or 408 — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 501 and 504, or a 425 — the endpoint is down, restarting, shedding load, or not taking the query yet. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, HTTP refusals such as 401/403/404, throttling, or instance faults, in some mix. `endpoints_rejected`: Every configured endpoint refused the call by HTTP status: a 401, 403, 404, or 501, a redirect, or another non-retried status below 500 other than 400 and 429. `pacer_shed`: The query waited 30 seconds in total for an Overpass slot while other calls held every slot it could take. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, a list_item match has no value, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query, or its response passed the server's 64 MiB read ceiling. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 or 408 with no busy-dispatcher remark — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 501 and 504, a 425, or a 504 or 408 whose remark says its dispatcher is too busy or turned off — the endpoint is down, restarting, shedding load, or not taking the query yet. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, HTTP refusals such as 401/403/404, throttling, or instance faults, in some mix. `endpoints_rejected`: Every configured endpoint refused the call by HTTP status: a 401, 403, 404, or 501, a redirect, or another non-retried status below 500 other than 400 and 429. `pacer_shed`: The query waited 30 seconds in total for an Overpass slot while other calls held every slot it could take. Other values are possible when a failure originates below the handler."
    • addedOutput schema / properties / limitNotice
      Added value: +{
      +  "description": "Present when limit exceeded this tool's maximum: the value requested and the one applied.",
      +  "type": "string"
      +}
    • changedOutput schema / properties / notice / description
      Previous value: -"Why this page is empty and what to try: nothing matched (widen the radius or change the tag), or offset ran past the end (retry lower). Absent when results were returned."New value: +"Why this page is empty and what to try: nothing matched (widen the radius or change the tag), or offset ran past the end (retry lower). On any page, also names the key to retry with when amenity names a value OpenStreetMap tags under another key (tourism=museum, not amenity=museum), and says when distances were measured to bounding-box centers. Absent otherwise."
  4. Changed3 schema fields changed
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 504 — the endpoint is down, restarting, or shedding load. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, HTTP refusals such as 401/403/404, throttling, or instance faults, in some mix. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 or 408 — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 501 and 504, or a 425 — the endpoint is down, restarting, shedding load, or not taking the query yet. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, HTTP refusals such as 401/403/404, throttling, or instance faults, in some mix. `endpoints_rejected`: Every configured endpoint refused the call by HTTP status: a 401, 403, 404, or 501, a redirect, or another non-retried status below 500 other than 400 and 429. `pacer_shed`: The query waited 30 seconds in total for an Overpass slot while other calls held every slot it could take. Other values are possible when a failure originates below the handler."
    • changedOutput schema / properties / error / properties / data / properties / reason / examples
      Previous value: -[
      -  "invalid_tag",
      -  "query_timeout",
      -  "result_too_large",
      -  "rate_limited",
      -  "upstream_error",
      -  "overpass_gateway_timeout",
      -  "overpass_unavailable",
      -  "endpoints_exhausted",
      -  "endpoints_unavailable"
      -]New value: +[
      +  "invalid_tag",
      +  "query_timeout",
      +  "result_too_large",
      +  "rate_limited",
      +  "upstream_error",
      +  "overpass_gateway_timeout",
      +  "overpass_unavailable",
      +  "endpoints_exhausted",
      +  "endpoints_unavailable",
      +  "endpoints_rejected",
      +  "pacer_shed"
      +]
    • changedOutput schema / properties / servingEndpoint / description
      Previous value: -"Overpass endpoint that answered, as origin and path. May name a failover mirror, or the endpoint that originally served a cached response. Read with data_timestamp when a result looks slow, sparse, or stale."New value: +"Overpass endpoint that answered, named by origin alone (scheme, host, port), with \"(entry N)\" added when two configured endpoints share an origin. May name a failover mirror, or the endpoint that originally served a cached response. Read with data_timestamp when a result looks slow, sparse, or stale."
  5. Changed1 schema field changed
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 504 — the endpoint is down, restarting, or shedding load. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, throttling, or instance faults, in some mix. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 504 — the endpoint is down, restarting, or shedding load. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, HTTP refusals such as 401/403/404, throttling, or instance faults, in some mix. Other values are possible when a failure originates below the handler."
  6. Changed5 schema fields changed
    • changedInput schema / properties / amenity / description
      Previous value: -"OSM amenity tag value (e.g., \"hospital\", \"pharmacy\", \"restaurant\", \"school\", \"atm\"). Shortcut for tag_key=\"amenity\". Cannot be combined with tag_key/tag_value."New value: +"OSM amenity tag value (e.g. \"hospital\", \"pharmacy\", \"restaurant\", \"atm\"), shortcut for tag_key=\"amenity\". Exactly one primary mode is required: this or tag_key, never both."
    • changedInput schema / properties / tag_key / description
      Previous value: -"Primary OSM tag key (e.g., \"leisure\", \"shop\", \"highway\", \"natural\"); omit tag_value for key existence, or supply it for exact equality. Cannot be combined with amenity. Additional filters are ANDed with this tag."New value: +"Primary OSM tag key (e.g. \"leisure\", \"shop\", \"highway\"); omit tag_value to match any feature carrying the key, or supply it for exact equality. The alternative to amenity, never both. Additional filters are ANDed with this tag."
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Primary tag modes conflict or are missing, a tag key or supplied value is blank, keys repeat after trimming, or any filter contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. Every one of them surfaces as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered — each accepted the query and held the connection past its attempt window instead of failing outright, or the call ran out of its total time budget before another endpoint could be tried. The message names each endpoint and the window it was given. `endpoints_unavailable`: No configured Overpass endpoint could serve the call — the hosts refused the connection, could not be resolved, were throttled, or reported their own instance fault, in some mix. The message names each endpoint and what it did. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Tag modes conflict or are missing, a key or supplied value is blank, keys repeat after trimming, or a filter carries Overpass QL metacharacters. `query_timeout`: The query exceeded timeout_seconds. `result_too_large`: Overpass ran out of memory on this query. `rate_limited`: Every configured endpoint refused the query as throttled — HTTP 429, or a throttle document in place of JSON. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion. `overpass_gateway_timeout`: Overpass answered HTTP 504 — the query exceeded the endpoint's own time budget, not timeout_seconds. `overpass_unavailable`: Overpass answered an HTTP 5xx other than 504 — the endpoint is down, restarting, or shedding load. `endpoints_exhausted`: No endpoint answered within its attempt window, or the total time budget ran out first. `endpoints_unavailable`: No configured endpoint would serve the call — connections refused, DNS failures, throttling, or instance faults, in some mix. Other values are possible when a failure originates below the handler."
    • changedOutput schema / properties / notice / description
      Previous value: -"Guidance when the page came back empty. Distinguishes a query that matched nothing (try a larger radius or different tag) from an offset past the end of a non-empty result set (retry at a lower offset). Absent when results were returned."New value: +"Why this page is empty and what to try: nothing matched (widen the radius or change the tag), or offset ran past the end (retry lower). Absent when results were returned."
    • changedOutput schema / properties / servingEndpoint / description
      Previous value: -"Overpass endpoint that produced this response, as origin and path. Differs from the first configured endpoint when a mirror answered after the primary failed, and names the endpoint that served a cached response rather than the one this call would have tried. Pair it with data_timestamp when a result looks unexpectedly slow, sparse, or stale."New value: +"Overpass endpoint that answered, as origin and path. May name a failover mirror, or the endpoint that originally served a cached response. Read with data_timestamp when a result looks slow, sparse, or stale."
  7. Changed2 schema fields changed
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Primary tag modes conflict or are missing, a tag key or supplied value is blank, keys repeat after trimming, or any filter contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. Every one of them surfaces as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered when the call ran out of its total time budget — each accepted the query and held the connection instead of failing outright. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Primary tag modes conflict or are missing, a tag key or supplied value is blank, keys repeat after trimming, or any filter contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. Every one of them surfaces as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered — each accepted the query and held the connection past its attempt window instead of failing outright, or the call ran out of its total time budget before another endpoint could be tried. The message names each endpoint and the window it was given. `endpoints_unavailable`: No configured Overpass endpoint could serve the call — the hosts refused the connection, could not be resolved, were throttled, or reported their own instance fault, in some mix. The message names each endpoint and what it did. Other values are possible when a failure originates below the handler."
    • changedOutput schema / properties / error / properties / data / properties / reason / examples
      Previous value: -[
      -  "invalid_tag",
      -  "query_timeout",
      -  "result_too_large",
      -  "rate_limited",
      -  "upstream_error",
      -  "overpass_gateway_timeout",
      -  "overpass_unavailable",
      -  "endpoints_exhausted"
      -]New value: +[
      +  "invalid_tag",
      +  "query_timeout",
      +  "result_too_large",
      +  "rate_limited",
      +  "upstream_error",
      +  "overpass_gateway_timeout",
      +  "overpass_unavailable",
      +  "endpoints_exhausted",
      +  "endpoints_unavailable"
      +]
  8. Changed6 schema fields changed
    • changedInput schema / anyOf
      Previous value: -[
      -  {
      -    "required": [
      -      "amenity"
      -    ],
      -    "type": "object"
      -  },
      -  {
      -    "required": [
      -      "tag_key",
      -      "tag_value"
      -    ],
      -    "type": "object"
      -  }
      -]New value: +[
      +  {
      +    "required": [
      +      "amenity"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "required": [
      +      "tag_key"
      +    ],
      +    "type": "object"
      +  }
      +]
    • addedInput schema / properties / filters
      Added value: +{
      +  "description": "Up to five additional filters, ANDed with the required primary amenity or tag_key filter in input order. Omitted or [] adds no conditions. Keys must be unique after trimming; keys and values must not contain Overpass QL metacharacters (\" \\ [ ] ; ( )).",
      +  "items": {
      +    "additionalProperties": false,
      +    "description": "One additional literal equality or key-existence filter.",
      +    "properties": {
      +      "key": {
      +        "description": "Literal OSM tag key. Trimmed and nonblank; must be unique across the primary tag and all filters.",
      +        "type": "string"
      +      },
      +      "value": {
      +        "description": "Literal exact-match value. Omit for key existence; an explicitly blank value is invalid. Trimmed before matching.",
      +        "type": "string"
      +      }
      +    },
      +    "required": [
      +      "key"
      +    ],
      +    "type": "object"
      +  },
      +  "maxItems": 5,
      +  "type": "array"
      +}
    • changedInput schema / properties / tag_key / description
      Previous value: -"OSM tag key for non-amenity queries (e.g., \"leisure\", \"shop\", \"highway\", \"natural\"). Use with tag_value. Cannot be combined with amenity."New value: +"Primary OSM tag key (e.g., \"leisure\", \"shop\", \"highway\", \"natural\"); omit tag_value for key existence, or supply it for exact equality. Cannot be combined with amenity. Additional filters are ANDed with this tag."
    • changedInput schema / properties / tag_value / description
      Previous value: -"OSM tag value paired with tag_key (e.g., \"park\", \"supermarket\", \"primary\", \"peak\")."New value: +"Literal value paired with tag_key for exact equality (e.g., \"park\", \"supermarket\"); omit for key existence. Explicit empty or whitespace-only values are invalid. Keys and values are trimmed; blank unused fields are ignored in amenity mode."
    • changedOutput schema / properties / effectiveTag / description
      Previous value: -"The OSM tag filter applied (key=value, e.g. \"amenity=cafe\" or \"leisure=park\")."New value: +"The full ordered AND filter chain: key=value for equality, key alone for existence (e.g. \"amenity=restaurant, cuisine=italian, name\")."
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Both amenity and tag_key/tag_value are provided, neither is provided, or a tag key/value contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. Every one of them surfaces as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered when the call ran out of its total time budget — each accepted the query and held the connection instead of failing outright. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Primary tag modes conflict or are missing, a tag key or supplied value is blank, keys repeat after trimming, or any filter contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. Every one of them surfaces as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered when the call ran out of its total time budget — each accepted the query and held the connection instead of failing outright. Other values are possible when a failure originates below the handler."
  9. Changed1 schema field changed
    • changedOutput schema / properties / error / properties / data / properties / reason / description
      Previous value: -"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Both amenity and tag_key/tag_value are provided, neither is provided, or a tag key/value contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. The thrown code tracks the status: 500 and 501 surface as InternalError, every other 5xx as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered when the call ran out of its total time budget — each accepted the query and held the connection instead of failing outright. Other values are possible when a failure originates below the handler."New value: +"Machine-readable failure mode. Declared by this tool: `invalid_tag`: Both amenity and tag_key/tag_value are provided, neither is provided, or a tag key/value contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. Every one of them surfaces as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered when the call ran out of its total time budget — each accepted the query and held the connection instead of failing outright. Other values are possible when a failure originates below the handler."
  10. Changed6 schema fields changed
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • addedInput schema / additionalProperties
      Added value: +false
    • changedOutput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • addedOutput schema / anyOf
      Added value: +[
      +  {
      +    "not": {
      +      "required": [
      +        "error"
      +      ]
      +    },
      +    "required": [
      +      "elements",
      +      "attribution",
      +      "effectiveTag",
      +      "totalFound",
      +      "truncated"
      +    ]
      +  },
      +  {
      +    "required": [
      +      "error"
      +    ]
      +  }
      +]
    • addedOutput schema / properties / error
      Added value: +{
      +  "additionalProperties": {},
      +  "description": "Present when the call failed. Absent on success.",
      +  "properties": {
      +    "code": {
      +      "description": "JSON-RPC error code for this failure.",
      +      "maximum": 9007199254740991,
      +      "minimum": -9007199254740991,
      +      "type": "integer"
      +    },
      +    "data": {
      +      "additionalProperties": {},
      +      "properties": {
      +        "reason": {
      +          "description": "Machine-readable failure mode. Declared by this tool: `invalid_tag`: Both amenity and tag_key/tag_value are provided, neither is provided, or a tag key/value contains Overpass QL metacharacters. `query_timeout`: The Overpass query exceeded the timeout. `result_too_large`: Overpass ran out of memory — the result set exceeds the server memory limit. `rate_limited`: Overpass refused the query as throttled — HTTP 429, or a throttle document instead of JSON — on every configured endpoint. With a list in OSM_OVERPASS_ENDPOINTS the call advances to the next entry first, so this surfaces only once all of them have refused it. `upstream_error`: Overpass reported a runtime error that is neither a timeout nor memory exhaustion — the message carries the remark verbatim. `overpass_gateway_timeout`: Overpass answered HTTP 504 — it accepted the query but its dispatcher gave up before producing a result, so the query exceeded the time budget the endpoint enforces rather than timeout_seconds. `overpass_unavailable`: Overpass answered with an HTTP 5xx other than 504 (500, 501, 502, 503) — the endpoint is down, restarting, or shedding load. The thrown code tracks the status: 500 and 501 surface as InternalError, every other 5xx as ServiceUnavailable. `endpoints_exhausted`: Every Overpass endpoint tried was still unanswered when the call ran out of its total time budget — each accepted the query and held the connection instead of failing outright. Other values are possible when a failure originates below the handler.",
      +          "examples": [
      +            "invalid_tag",
      +            "query_timeout",
      +            "result_too_large",
      +            "rate_limited",
      +            "upstream_error",
      +            "overpass_gateway_timeout",
      +            "overpass_unavailable",
      +            "endpoints_exhausted"
      +          ],
      +          "type": "string"
      +        },
      +        "recovery": {
      +          "additionalProperties": {},
      +          "description": "Actionable next step for the caller.",
      +          "properties": {
      +            "hint": {
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "hint"
      +          ],
      +          "type": "object"
      +        },
      +        "retryable": {
      +          "description": "Whether retrying may succeed.",
      +          "type": "boolean"
      +        }
      +      },
      +      "type": "object"
      +    },
      +    "message": {
      +      "description": "Human-readable description of what went wrong.",
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "code",
      +    "message"
      +  ],
      +  "type": "object"
      +}
    • removedOutput schema / required
      Removed value: -[
      -  "elements",
      -  "attribution",
      -  "effectiveTag",
      -  "totalFound",
      -  "truncated"
      -]
  11. Changed2 schema fields changed
    • changedInput schema / properties / element_types / description
      Previous value: -"OSM element types to search. Ways cover most buildings and areas; nodes cover most standalone POIs. Add \"relation\" for complex structures like large campuses."New value: +"OSM element types to search, at least one. Ways cover most buildings and areas; nodes cover most standalone POIs. Add \"relation\" for complex structures like large campuses. Omit the field to search nodes and ways; an empty array is rejected because it can only match nothing."
    • addedInput schema / properties / element_types / minItems
      Added value: +1
  12. Changed1 schema field changed
    • addedInput schema / anyOf
      Added value: +[
      +  {
      +    "required": [
      +      "amenity"
      +    ],
      +    "type": "object"
      +  },
      +  {
      +    "required": [
      +      "tag_key",
      +      "tag_value"
      +    ],
      +    "type": "object"
      +  }
      +]
  13. Changed1 schema field changed
    • addedOutput schema / properties / servingEndpoint
      Added value: +{
      +  "description": "Overpass endpoint that produced this response, as origin and path. Differs from the first configured endpoint when a mirror answered after the primary failed, and names the endpoint that served a cached response rather than the one this call would have tried. Pair it with data_timestamp when a result looks unexpectedly slow, sparse, or stale.",
      +  "type": "string"
      +}
  14. Changed2 schema fields changed
    • changedOutput schema / properties / data_timestamp / description
      Previous value: -"OSM data freshness timestamp from the Overpass response."New value: +"OSM data freshness timestamp from the Overpass response. Absent when the endpoint reported no freshness metadata."
    • changedOutput schema / required
      Previous value: -[
      -  "elements",
      -  "data_timestamp",
      -  "attribution",
      -  "effectiveTag",
      -  "totalFound",
      -  "truncated"
      -]New value: +[
      +  "elements",
      +  "attribution",
      +  "effectiveTag",
      +  "totalFound",
      +  "truncated"
      +]
  15. Changed1 schema field changed
    • changedOutput schema / properties / elements / items / properties / osm_id / description
      Previous value: -"OSM element ID. Use with osm_type for openstreetmap_lookup."New value: +"OSM element ID. Use with osm_type for openstreetmap_lookup_objects."
  16. Changed1 schema field changed
    • changedOutput schema / properties / notice / description
      Previous value: -"Guidance when no features were found — e.g., try a larger radius or different tag. Absent when results were returned."New value: +"Guidance when the page came back empty. Distinguishes a query that matched nothing (try a larger radius or different tag) from an offset past the end of a non-empty result set (retry at a lower offset). Absent when results were returned."
  17. Changed3 schema fields changed
    • addedInput schema / properties / offset
      Added value: +{
      +  "default": 0,
      +  "description": "Number of matching features to skip before applying limit, for paging through a large result set. Features are distance-sorted before paging, so higher offsets return progressively farther matches; the full set is cached ~10 minutes so re-paging costs no extra upstream request. Pass the nextOffset value from a prior truncated response.",
      +  "maximum": 9007199254740991,
      +  "minimum": 0,
      +  "type": "integer"
      +}
    • addedOutput schema / properties / nextOffset
      Added value: +{
      +  "description": "Offset to pass on the next call to retrieve the following page of features. Present only when more features remain beyond this page.",
      +  "type": "number"
      +}
    • changedOutput schema / properties / truncated / description
      Previous value: -"True if results were cut at the limit. Reduce radius or add more specific tags to narrow the result set."New value: +"True if results were cut at the limit. Reduce radius, add more specific tags, or page with offset to retrieve the rest."
  18. Changed5 schema fields changed
    • addedOutput schema / properties / effectiveTag
      Added value: +{
      +  "description": "The OSM tag filter applied (key=value, e.g. \"amenity=cafe\" or \"leisure=park\").",
      +  "type": "string"
      +}
    • addedOutput schema / properties / notice
      Added value: +{
      +  "description": "Guidance when no features were found — e.g., try a larger radius or different tag. Absent when results were returned.",
      +  "type": "string"
      +}
    • addedOutput schema / properties / totalFound
      Added value: +{
      +  "description": "Total features returned by Overpass before limit truncation.",
      +  "type": "number"
      +}
    • removedOutput schema / properties / total_found
      Removed value: -{
      -  "description": "Total features returned by Overpass before limit truncation.",
      -  "type": "number"
      -}
    • changedOutput schema / required
      Previous value: -[
      -  "elements",
      -  "total_found",
      -  "truncated",
      -  "data_timestamp",
      -  "attribution"
      -]New value: +[
      +  "elements",
      +  "data_timestamp",
      +  "attribution",
      +  "effectiveTag",
      +  "totalFound",
      +  "truncated"
      +]
  19. Changed1 schema field changed
    • addedOutput schema / properties / elements / items / properties / distance_meters
      Added value: +{
      +  "description": "Great-circle distance in meters from the query center, rounded to one decimal. Results are sorted ascending by this value; omitted for elements without a computed coordinate.",
      +  "type": "number"
      +}
  20. First observed

TDQS

A4.3/5.0
Behavior5/5

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

Annotations already cover the safety profile (readOnly, idempotent, open world), and the description adds real behavioral detail beyond them: results carry the full OSM tag set, are sorted nearest-first by distance_meters, and enclosed areas such as a park or city match at 0 m regardless of radius. The limit cap with limitNotice and the ~10-minute result cache for offset paging are also disclosed upstream-side effects an agent needs.

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?

Three sentences, front-loaded with purpose and routing before the filtering and sorting detail. It is dense but nearly every clause carries information; the one weak spot is that the filter-syntax sentence compresses several constraints (uniqueness, metacharacter bans) that the schema already spells out.

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?

For a 12-parameter spatial query with an output schema, the description covers the remaining gaps an agent would otherwise stumble on: how to pick the primary filter key, that enclosure returns 0 m, that results are distance-sorted, and that truncation happens after the Overpass query. Return-value structure is correctly left to the output schema.

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 the schema already carries per-parameter meaning and the baseline would be 3. The description still reinforces the highest-risk interactions in prose — the amenity-or-tag_key exclusivity, the ANDing of up to five filters, and the 0 m enclosure behavior — which affects how radius_meters is interpreted, though much of it restates the schema.

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 specific verb and resource — "Find OSM features within a radius of a point via the Overpass API" — and frames it as the tool for "what is near X?" questions. The radius-around-a-point scope implicitly separates it from openstreetmap_query_bbox and openstreetmap_search_places, but no sibling is named, so the differentiation is inferred rather than explicit.

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 clear when-to-use framing (proximity questions) and strong intra-tool routing: amenity vs tag_key are mutually exclusive, and it warns that museums, hotels, parks and supermarkets live under tourism/leisure/shop keys and need tag_key plus tag_value. It never states when to prefer the bbox or raw sibling instead, so the cross-tool decision is left to the agent.

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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