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// MCP TOKEN COST

The TinyFn MCP server costs 39,394 tokens before the first call.

Every request your agent makes carries every tool definition this server exposes — context your code, documents and conversation can't use, mostly for tools the agent never calls. You don't need them all in the window, and you don't have to pay for them.

QUICK ANSWER The TinyFn MCP server's 572 tool definitions consume 39,394 tokens — 20% of a 200k context window, and 21× the median MCP server (1,920 tokens). A scoped grant exposing only the tools you use cuts that roughly in proportion.

MEASURED FROM SCHEMAS tiktoken o200k_base · rank #60 of 8,127 measured servers · refreshed every build Method →
// CONTEXT WINDOW SHARE

What that costs before your agent starts working.

Tool definitions are overhead: they occupy context on every request and compete with your code, documents and conversation history for the same window.

200K WINDOW 20%
1M WINDOW 3.9%

Corpus context: TinyFn ranks #60 of 8,127 measured MCP servers by definition cost. The median is 1,920 tokens, p90 is 12,644, and the heaviest (Ainumbers Mcp Apps) is 325,784 — 163% of a 200k window on its own. New to this? See MCP token cost and context window in the glossary.

Token cost is one axis. See the risk picture across your whole stack →

// PER-TOOL BREAKDOWN

Where the 39,394 tokens go.

Each row is one tool definition as a tools/list entry — name, description and input schema — counted with o200k_base. Average: 69 tokens per tool.

ToolCategoryTokens% of server
random_password Read 204 0.5%
generate_password Write 203 0.5%
generate_password_2 Write 198 0.5%
haversine_distance Read 188 0.5%
sun_position Read 182 0.5%
random_name Read 173 0.4%
estimate_body_fat Read 168 0.4%
calculate_midpoint Read 160 0.4%
destination_point Read 159 0.4%
calculate_bearing Read 158 0.4%
normalize_url Read 155 0.4%
cmyk_to_hex Read 154 0.4%
subtract_time Read 153 0.4%
add_time Write 153 0.4%
random_email Read 151 0.4%
get_password_pattern Read 150 0.4%
random_date Read 148 0.4%
random_gaussian Read 146 0.4%
random_integer Read 141 0.4%
calculate_bmr Read 140 0.4%
random_float_2 Execute 137 0.3%
random_person Read 136 0.3%
subtract_time_2 Read 135 0.3%
add_time_2 Write 135 0.3%
random_string_2 Execute 135 0.3%
compound_interest Read 134 0.3%
random_hex Read 134 0.3%
random_float Read 131 0.3%
dms_to_decimal Read 129 0.3%
distance Read 127 0.3%
mask_text Read 126 0.3%
bounding_box Read 126 0.3%
point_in_polygon Read 126 0.3%
mortgage_calculator Read 125 0.3%
generate_passphrase Write 125 0.3%
generate_dates Read 124 0.3%
random_text Read 123 0.3%
random_weighted_choice Execute 122 0.3%
slugify Read 122 0.3%
hsl_to_hex Read 121 0.3%
random_coordinates Read 121 0.3%
random_ip Read 121 0.3%
build_url_2 Write 120 0.3%
random_string Read 120 0.3%
hsv_to_hex Read 119 0.3%
rgb_to_hsl Read 119 0.3%
rgb_to_hex Read 117 0.3%
random_time Read 114 0.3%
regex_replace Write 114 0.3%
count_substring Read 113 0.3%
geohash_encode Read 113 0.3%
blend_colors Read 112 0.3%
break_even Read 112 0.3%
random_choice Read 112 0.3%
pad Read 111 0.3%
random_phone Read 111 0.3%
format_number Read 109 0.3%
prettify_json Read 109 0.3%
random_number Read 108 0.3%
format_percentage Read 107 0.3%
lorem_markdown Read 107 0.3%
is_between Read 106 0.3%
random_mac Read 105 0.3%
count_char Read 104 0.3%
random_address Read 104 0.3%
random_boolean Read 104 0.3%
random_credit_card Read 104 0.3%
base_convert Read 104 0.3%
calories_burned Read 103 0.3%
format_list Read 103 0.3%
filename_safe Read 102 0.3%
generate_gradient Read 102 0.3%
find_all_matches Read 100 0.3%
random_coin Read 99 0.3%
random_emoji_2 Read 99 0.3%
regex_split Read 99 0.3%
test_pattern Read 99 0.3%
random_company Read 98 0.2%
random_job Read 98 0.2%
calculate_tip Read 97 0.2%
convert_timezone Read 97 0.2%
calculate_vat Read 96 0.2%
calculate_zscore Read 96 0.2%
format_currency Read 96 0.2%
generate_hmac Execute 96 0.2%
generate_lorem Read 96 0.2%
format_truncate Read 95 0.2%
deslugify Read 95 0.2%
leetspeak_password Read 95 0.2%
loan_payment Read 94 0.2%
present_value Read 94 0.2%
repeat Read 94 0.2%
future_value Read 93 0.2%
sort_items Read 93 0.2%
truncate_2 Destructive 92 0.2%
is_palindrome Read 92 0.2%
log Read 92 0.2%
polygon_area Read 92 0.2%
random_uuid Read 92 0.2%
rank_numbers Read 92 0.2%
simple_interest Read 92 0.2%
merge_json Write 92 0.2%
contains Read 91 0.2%
polyline_length Read 91 0.2%
random_dice Read 91 0.2%
generate_uuid Write 91 0.2%
desaturate_color Read 90 0.2%
in_range Read 90 0.2%
build_url Write 89 0.2%
calculate_covariance Read 89 0.2%
darken_color Read 88 0.2%
get_json_path Read 88 0.2%
heart_rate_zones Read 88 0.2%
random_bytes_2 Read 88 0.2%
random_color_2 Read 88 0.2%
saturate_color Read 88 0.2%
verify_hash Read 88 0.2%
lorem_words_2 Read 87 0.2%
random_card Read 87 0.2%
random_emoji Read 87 0.2%
lighten_color Read 86 0.2%
random_username Read 86 0.2%
daily_water_intake Read 85 0.2%
expand_cidr Read 85 0.2%
lorem_paragraphs Read 85 0.2%
lorem_sentences Read 85 0.2%
roll_dice Execute 85 0.2%
generate_sequence Read 85 0.2%
calculate_bmi Read 84 0.2%
format_bytes Read 84 0.2%
hash_blake2b Read 84 0.2%
hash_blake2s Read 84 0.2%
json_prettify Read 84 0.2%
lorem_html Read 84 0.2%
add_query_param Write 84 0.2%
generate_tints Read 84 0.2%
business_days Read 83 0.2%
clamp Read 83 0.2%
compare_decimals Read 83 0.2%
generate_shades Read 83 0.2%
generate_token Write 83 0.2%
array_difference Read 82 0.2%
array_slice Read 82 0.2%
random_bytes Read 82 0.2%
sleep_cycles Read 82 0.2%
generate_ngrams Read 82 0.2%
start_of_period Read 81 0.2%
end_of_period Read 81 0.2%
generate_color Write 81 0.2%
replace Write 81 0.2%
array_symmetric_difference Read 80 0.2%
calculate_age_2 Read 80 0.2%
calculate_macros Read 80 0.2%
extract_keywords Read 80 0.2%
format_phone Read 80 0.2%
nearest_power Read 80 0.2%
generate_phones Write 80 0.2%
days_in_month_2 Read 79 0.2%
is_power_of Read 79 0.2%
decimal_to_dms Read 78 0.2%
format_date Read 78 0.2%
pick_random Read 78 0.2%
levenshtein_distance Read 78 0.2%
days_in_month Read 77 0.2%
primes_in_range Read 77 0.2%
generate_emails Write 77 0.2%
generate_names Read 77 0.2%
calculate_percentile Read 76 0.2%
date_diff Read 76 0.2%
format_duration Read 76 0.2%
ideal_weight Read 76 0.2%
to_alternating_case Read 76 0.2%
generate_hash Read 76 0.2%
calculate_variance Read 75 0.2%
compare Read 75 0.2%
compare_hashes Read 75 0.2%
contrast_ratio Read 75 0.2%
ip_in_range Read 75 0.2%
range_to_cidr Read 75 0.2%
subnet_calculator Read 75 0.2%
time_difference Read 75 0.2%
unflatten_json Read 75 0.2%
array_rotate Read 74 0.2%
extract_domain Read 74 0.2%
integer_to_ip Read 74 0.2%
is_subset Read 74 0.2%
text_similarity Read 74 0.2%
validate_date Read 74 0.2%
add_business_days Write 74 0.2%
array_fill Write 74 0.2%
array_first Read 73 0.2%
array_intersection Read 73 0.2%
array_last Read 73 0.2%
is_valid_url Read 73 0.2%
return_on_investment Read 73 0.2%
array_dedupe Destructive 72 0.2%
array_interleave Read 72 0.2%
array_nth Read 72 0.2%
array_repeat Read 72 0.2%
array_union Read 72 0.2%
calculate_margin Read 72 0.2%
ip_in_network Read 72 0.2%
is_divisible Read 72 0.2%
json_diff Read 72 0.2%
array_zip Read 71 0.2%
calculate_markup Read 71 0.2%
chunk_array Read 71 0.2%
divide Read 71 0.2%
hypotenuse Read 71 0.2%
nth_root Read 71 0.2%
round_number Read 71 0.2%
parse_date Read 70 0.2%
calculate_discount Read 70 0.2%
calculate_stddev Read 70 0.2%
format_relative_time Read 70 0.2%
is_perfect_number Read 70 0.2%
array_partition Read 69 0.2%
constant_time_compare Read 69 0.2%
ends_with Read 69 0.2%
flatten_json Read 69 0.2%
modulo Read 69 0.2%
percentage_change Read 69 0.2%
starts_with Read 69 0.2%
generate_memorable Write 69 0.2%
remove_query_param Write 68 0.2%
join Read 68 0.2%
unix_to_datetime Read 68 0.2%
extract_groups Read 67 0.2%
get_initials Read 67 0.2%
url_encode_2 Read 67 0.2%
validate_phone Read 67 0.2%
calculate_correlation Read 66 0.2%
cidr_info Read 66 0.2%
hmac_md5 Read 66 0.2%
hmac_sha256 Read 66 0.2%
hmac_sha512 Read 66 0.2%
join_path Read 66 0.2%
netmask_to_cidr Read 66 0.2%
nth_prime Read 66 0.2%
power Read 66 0.2%
split Read 66 0.2%
cidr_to_netmask Read 65 0.2%
is_valid_coordinates Read 65 0.2%
subnet_mask_info Read 65 0.2%
format_ordinal Read 64 0.2%
hex_to_cmyk Read 64 0.2%
lorem_bytes Read 64 0.2%
number_to_roman Read 64 0.2%
polygon_centroid Read 64 0.2%
generate_uuid_v7 Read 64 0.2%
array_unzip Read 63 0.2%
file_checksum_guide Read 63 0.2%
hex_to_hsl Read 63 0.2%
liters_to_gallons_uk Read 63 0.2%
percentage Read 63 0.2%
gcd Read 62 0.2%
get_credit_card_pattern Read 62 0.2%
get_divisors Read 62 0.2%
hex_to_hsv Read 62 0.2%
lcm Read 62 0.2%
milliliters_to_fluid_ounces Read 62 0.2%
network_info Read 62 0.2%
to_roman Read 62 0.2%
triadic_colors Read 62 0.2%
compare_2 Read 61 0.2%
current_time Read 61 0.2%
hex_to_rgb Read 61 0.2%
is_armstrong_number Read 61 0.2%
number_to_words Read 61 0.2%
subtract Read 61 0.2%
digital_root Read 60 0.2%
fibonacci Read 60 0.2%
kilobytes_to_megabytes Read 60 0.2%
rule_of_72 Read 60 0.2%
analogous_colors Read 59 0.1%
milliliters_to_cups Read 59 0.1%
random_url Read 59 0.1%
complement_color Read 58 0.1%
factorial Read 58 0.1%
fizzbuzz Read 58 0.1%
ipv6_to_ipv4 Read 58 0.1%
is_private_ip Read 58 0.1%
prime_factors Read 58 0.1%
query_string_to_json Read 58 0.1%
random_element Read 58 0.1%
square_meters_to_square_feet Read 58 0.1%
tetradic_colors Read 58 0.1%
collatz_sequence Read 57 0.1%
gallons_uk_to_liters Read 57 0.1%
ipv4_to_ipv6 Read 57 0.1%
ipv4_to_ipv6_2 Read 57 0.1%
meters_per_second_to_mph Read 57 0.1%
rot13 Read 57 0.1%
square_feet_to_square_meters Read 57 0.1%
supernet_calculator Read 57 0.1%
generate_companies Read 57 0.1%
generate_uuids Read 57 0.1%
gallons_us_to_liters Read 56 0.1%
get_now Read 56 0.1%
get_time_pattern Read 56 0.1%
kph_to_mph Read 56 0.1%
punycode_encode Read 56 0.1%
status_code_info Read 56 0.1%
timezone_offset Read 56 0.1%
calculate_quartiles Read 55 0.1%
cups_to_milliliters Read 55 0.1%
geohash_decode Read 55 0.1%
get_uuid_pattern Read 55 0.1%
identify_hash Read 55 0.1%
lorem_words Read 55 0.1%
nth_triangular Read 55 0.1%
relative_time Read 55 0.1%
sign Read 55 0.1%
to_screaming_snake_case Read 55 0.1%
flip_coin Read 54 0.1%
get_phone_pattern Read 54 0.1%
is_valid_hex Read 54 0.1%
json_to_query_string Read 54 0.1%
log10 Read 54 0.1%
log2 Read 54 0.1%
megabytes_to_gigabytes Read 54 0.1%
minify_json Read 54 0.1%
nth_cube Read 54 0.1%
nth_square Read 54 0.1%
port_info Read 54 0.1%
readability_score Read 54 0.1%
validate_base64 Read 54 0.1%
week_number_2 Read 54 0.1%
convert_timestamp_ms Read 54 0.1%
generate_addresses Write 54 0.1%
date_to_timestamp Read 53 0.1%
estimate_hash_time Read 53 0.1%
get_date_pattern Read 53 0.1%
get_email_pattern Read 53 0.1%
get_url_pattern Read 53 0.1%
is_triangular Read 53 0.1%
jwt_decode Read 53 0.1%
liters_to_gallons_us Read 53 0.1%
mph_to_kph Read 53 0.1%
validate_json_2 Read 53 0.1%
generate_pin Write 53 0.1%
json_minify Read 52 0.1%
calculate_age Read 52 0.1%
day_of_year Read 52 0.1%
ip_info_2 Read 52 0.1%
is_leap_year_2 Read 52 0.1%
knots_to_kph Read 52 0.1%
to_constant_case Read 52 0.1%
to_header_case Read 52 0.1%
validate_ip Read 52 0.1%
validate_ip_2 Read 52 0.1%
validate_pattern Read 52 0.1%
array_compact Destructive 51 0.1%
acres_to_hectares Read 51 0.1%
base64_encode Read 51 0.1%
bytes_to_human Read 51 0.1%
datetime_to_unix Read 51 0.1%
get_luminance Read 51 0.1%
get_quarter Read 51 0.1%
grayscale_color Read 51 0.1%
hash_sha3_256 Read 51 0.1%
hash_sha3_512 Read 51 0.1%
html_decode Read 51 0.1%
inverse_case Read 51 0.1%
is_perfect_square Read 51 0.1%
is_weekend Read 51 0.1%
morse_decode Read 51 0.1%
pounds_to_kilograms Read 51 0.1%
random_excuse Read 51 0.1%
smart_title_case Read 51 0.1%
split_complementary_colors Read 51 0.1%
week_number Read 51 0.1%
celsius_to_fahrenheit Read 50 0.1%
celsius_to_kelvin Read 50 0.1%
cube_root Read 50 0.1%
escape_pattern Read 50 0.1%
fahrenheit_to_celsius Read 50 0.1%
get_json_type Read 50 0.1%
get_keys Read 50 0.1%
get_values Read 50 0.1%
hash_adler32 Read 50 0.1%
hexadecimal_to_decimal Read 50 0.1%
inches_to_centimeters Read 50 0.1%
is_fibonacci Read 50 0.1%
is_leap_year Read 50 0.1%
is_valid_slug Read 50 0.1%
json_stats Read 50 0.1%
kelvin_to_celsius Read 50 0.1%
kilograms_to_pounds Read 50 0.1%
kilometers_to_miles Read 50 0.1%
magic_8_ball Read 50 0.1%
miles_to_kilometers Read 50 0.1%
normalize_whitespace Read 50 0.1%
punycode_decode Read 50 0.1%
seconds_to_hms Read 50 0.1%
square_root Read 50 0.1%
validate_credit_card Read 50 0.1%
centimeters_to_inches Read 49 0.1%
count_all_chars Read 49 0.1%
extract_emails Read 49 0.1%
flatten_array Read 49 0.1%
html_encode Read 49 0.1%
is_common_password Read 49 0.1%
is_empty Read 49 0.1%
is_palindrome_number Read 49 0.1%
morse_encode Read 49 0.1%
random_shuffle Read 49 0.1%
roman_to_number Read 49 0.1%
convert_all_cases Read 49 0.1%
truncate Read 48 0.1%
parse_url_2 Read 48 0.1%
base64_decode Read 48 0.1%
capitalize Read 48 0.1%
format_credit_card Read 48 0.1%
hash_sha1 Read 48 0.1%
hash_sha256 Read 48 0.1%
hash_sha384 Read 48 0.1%
hash_sha512 Read 48 0.1%
ip_info Read 48 0.1%
ip_to_binary Read 48 0.1%
is_integer Read 48 0.1%
is_odd Read 48 0.1%
kebab_case Read 48 0.1%
metaphone Read 48 0.1%
name_to_hex Read 48 0.1%
ounces_to_grams Read 48 0.1%
password_entropy Read 48 0.1%
random_compliment Read 48 0.1%
sum_digits Read 48 0.1%
to_kebab_case Read 48 0.1%
validate_hex Read 48 0.1%
yes_no Read 48 0.1%
generate_acronym Read 48 0.1%
remove_duplicate_words Write 47 0.1%
remove_whitespace Read 47 0.1%
adler32_checksum Read 47 0.1%
average Read 47 0.1%
basic_sentiment Read 47 0.1%
calculate_mode Read 47 0.1%
calculate_range Read 47 0.1%
echo Read 47 0.1%
extract_numbers Read 47 0.1%
extract_urls Read 47 0.1%
format_ssn Read 47 0.1%
friendly_roast Read 47 0.1%
grams_to_ounces Read 47 0.1%
group_by_length Read 47 0.1%
hash_all Read 47 0.1%
hash_crc32 Read 47 0.1%
hash_md5 Read 47 0.1%
hello_world Read 47 0.1%
invert_color Read 47 0.1%
ip_to_integer Read 47 0.1%
is_even Read 47 0.1%
is_negative Read 47 0.1%
is_positive Read 47 0.1%
is_prime Read 47 0.1%
is_zero Read 47 0.1%
multiply Read 47 0.1%
pascal_case Read 47 0.1%
rad_to_deg Read 47 0.1%
sentence_case Read 47 0.1%
shuffle_list Read 47 0.1%
slug Read 47 0.1%
stone_to_kilograms Read 47 0.1%
string_length Read 47 0.1%
title_case Read 47 0.1%
to_camel_case Read 47 0.1%
to_pascal_case Read 47 0.1%
to_path_case Read 47 0.1%
to_snake_case Read 47 0.1%
to_train_case Read 47 0.1%
to_upper_case Read 47 0.1%
url_decode_2 Read 47 0.1%
user_agent Read 47 0.1%
validate_alphanumeric Read 47 0.1%
validate_json Read 47 0.1%
validate_semver Read 47 0.1%
word_count Read 47 0.1%
add Read 47 0.1%
convert_timestamp Read 47 0.1%
parse_url Read 46 0.1%
absolute_value Read 46 0.1%
analyze_password Read 46 0.1%
ascii_decode Read 46 0.1%
ascii_encode Read 46 0.1%
calculate_mean Read 46 0.1%
camel_case Read 46 0.1%
count_digits Read 46 0.1%
decimal_to_octal Read 46 0.1%
describe_data Read 46 0.1%
detect_case Read 46 0.1%
feet_to_meters Read 46 0.1%
http_method_info Read 46 0.1%
meters_to_feet Read 46 0.1%
reverse_number Read 46 0.1%
snake_case Read 46 0.1%
soundex Read 46 0.1%
suggest_improvements Read 46 0.1%
to_dot_case Read 46 0.1%
to_sentence_case Read 46 0.1%
to_title_case Read 46 0.1%
unique_items Read 46 0.1%
validate_uuid Read 46 0.1%
array_frequency Read 45 0.1%
binary_decode Read 45 0.1%
binary_encode Read 45 0.1%
binary_to_decimal Read 45 0.1%
capitalize_text Read 45 0.1%
cos Read 45 0.1%
count_items Read 45 0.1%
crc32_checksum Read 45 0.1%
cube Read 45 0.1%
decimal_to_hexadecimal Read 45 0.1%
deg_to_rad Read 45 0.1%
exp Read 45 0.1%
geometric_mean Read 45 0.1%
harmonic_mean Read 45 0.1%
hex_decode Read 45 0.1%
hex_encode Read 45 0.1%
hours_to_minutes Read 45 0.1%
lowercase Read 45 0.1%
md5_checksum Read 45 0.1%
minutes_to_seconds Read 45 0.1%
sha1_checksum Read 45 0.1%
sha256_checksum Read 45 0.1%
sha512_checksum Read 45 0.1%
sin Read 45 0.1%
square Read 45 0.1%
sum_numbers Read 45 0.1%
swap_case Read 45 0.1%
tan Read 45 0.1%
to_lower_case Read 45 0.1%
url_decode Read 45 0.1%
validate_domain Read 45 0.1%
validate_email Read 45 0.1%
validate_mac Read 45 0.1%
calculate_product Read 44 0.1%
calculate_sum Read 44 0.1%
ceil Read 44 0.1%
decimal_to_binary Read 44 0.1%
floor Read 44 0.1%
reverse_string Read 44 0.1%
trim Read 44 0.1%
uppercase Read 44 0.1%
url_encode Read 44 0.1%
validate_password_strength Read 44 0.1%
array_reverse Read 43 0.1%
calculate_median Read 43 0.1%
maximum Read 43 0.1%
max_value Read 43 0.1%
minimum Read 43 0.1%
min_value Read 43 0.1%
validate_url Read 43 0.1%
get_ipv4_pattern Read 34 0.1%
get_ipv6_pattern Read 34 0.1%
private_ip_ranges Read 34 0.1%
would_you_rather Read 34 0.1%
get_hex_color_pattern Read 33 0.1%
get_slug_pattern Read 32 0.1%
list_locales Read 32 0.1%
null Other 32 0.1%
list_timezones Read 31 0.1%
dad_joke Read 30 0.1%
random_trivia Read 30 0.1%
fortune_cookie Read 29 0.1%
empty_array Read 28 0.1%
empty_object Read 28 0.1%
ping Read 28 0.1%
random_color Read 28 0.1%
false_endpoint Read 26 0.1%
true_endpoint Read 26 0.1%
// CUT THE COST

Your agent uses a handful of these tools. It pays for all 572.

You don't need all 572 of those definitions in the window. PolicyLayer is an MCP gateway that sits in front of TinyFn: only the tools you grant are exposed to the agent, the rest never load. A smaller window means a sharper agent — less noise when it picks a tool — and every request costs less:

Grant scopeDefinition costReduction
All 572 tools (no gateway) 39,394 tokens —
3 granted tools ~207 tokens −99%
5 granted tools ~344 tokens −99%
10 granted tools ~689 tokens −98%

The risk dividend: 3 of these 572 tools are critical-risk (destructive or financial) and cost 215 tokens (1% of the definition load). Block them — the recommended starter policy — and you reclaim that context before tuning anything else.

  1. Create a free account and register TinyFn — nothing to install.
  2. Grant only the tools you use — ungranted definitions never enter the context window.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
CUT TINYFN TOKEN COST →

Instant setup, no code required.

Model your own stack in the token-cost calculator, or see the TinyFn policy for what a sensible grant looks like.

//FAQ

TinyFn token-cost questions.

How many tokens does the TinyFn MCP server use?+

Its 572 tool definitions total 39,394 tokens — 20% of a 200k context window — measured with tiktoken o200k_base over the serialised tools/list payload. Exact counts vary slightly by client and model.

Why does TinyFn consume tokens before I send a message?+

MCP clients load every connected server's tool definitions — name, description, and input schema — into the model's context so it knows what it can call. That payload is charged against your context window on every request, whether or not a tool is used.

How do I reduce TinyFn's token usage?+

Expose fewer tools. A PolicyLayer grant scopes TinyFn to only the tools you allow — ungranted definitions are filtered out of the tool list, so they never enter the context window. A grant of 3 typical tools costs roughly 207 tokens, a 99% reduction.

Does deferred tool loading fix this?+

Partially, in some clients. Claude Code defers MCP tool schemas behind a tool-search step by default, and VS Code has experimental grouping — but you still pay tokens per search and reload, and Cursor, Windsurf and Gemini CLI load definitions upfront. Reducing the exposed tool set cuts the cost in every client.

// METHOD & REVIEW

How these numbers were measured.

01
Serialisation

Each tool is serialised as a tools/list entry — name, description, input schema — from the schemas in the PolicyLayer scan database. Clients differ slightly in framing, so treat counts as close estimates.

02
Tokeniser

tiktoken o200k_base (GPT-4o/o-series). Anthropic's current tokeniser isn't published, so Claude's exact counts will differ; for English text and JSON schemas the totals are close enough to treat these as estimates.

03
Deferred loading

Some clients now defer schema loading (Claude Code's tool search; VS Code experimental grouping). You still pay per search and reload — and Cursor, Windsurf and Gemini CLI load everything upfront.

Computed 05-09-2026 from the PolicyLayer scan database over all 572 catalogued TinyFn tools. Counts refresh with every site build.

THIS SERVER: All TinyFn tools TinyFn policy Token-cost calculator

Expose only the tools you use — the rest never enter your context.

A PolicyLayer grant scopes TinyFn to the tools you actually allow. Ungranted definitions never load, and every call that does run is checked against policy first.

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46,500+ MCP servers and 515,000+ tools scanned and risk-classified.

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